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The 8 Best hole enlarging drill bits of 2024

Are you trying to find hole enlarging drill bits among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling hole enlarging drill bits on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 14 hours of research and did 89 hole enlarging drill bits tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best hole enlarging drill bits you can buy today

No. 1
FACHLICH 25mm Diamond Milling Bits for Porcelain Ceramic Marble Granite Existing Holes Enlarging Shaping
  • 25mm vacuum brazed Milling Bits for porcelian tile granite and all similar material
  • Diameter: 25mm, Workable length: 50mm, Grit: #50/60, Total length: 65mm
  • Produced in vacuum brazed technology which could provide high efficient working performance
  • Enlarge, shape and/or round bevel existing holes in Porcelain, Hard Ceramic, marble and granite
  • Grit #50/60 provide you great finishing; With 5/8"-11 thread, used on angle grinder, very easy to operate
No. 2
Diamond Beveling Chamfer Bits with 5/8-11" Thread Adapter, 1-7/8"(48mm) Chamfer Cone 25mm Diamond Finger Milling Bit, Diamond Countersink Drill Bit for Existing Holes Enlarging Shaping Trimming
  • 【Size】Chamfer Bit - Dia: 1-7/8" (48mm), Threads: 5/8"-11, Grit: #80, Degree: 60. Diamond Finger Milling Bit- Dia: 25mm, Threads: 5/8"-11. The two bits fit on 5/8"-11 thread angle grinder. PLUS a 5/8-11" thread adapter for use on drills.
  • 【Function and Used For】Designed to enlarge, shape, and round bevel existing holes in porcelain, hard ceramic, granite, stones, marble, etc. Also easily create round shape indentation to accommodate pipes or electric wire lines.
  • 【Premium Material】TolleSonne Diamond countersink drill bit is made of premium diamond and durable metal, high strength and hardness, very useful to improve the edge finishing of exposed holes, provide a smooth, high-end finish.
  • 【Save Time & Money】With just one standard core bit, you are able to create many different hole sizes, no need to purchase several bits.
  • 【Attention】This diamond beveling chamfer Bit can NOT be used to drill holes, only to enlarge, shape, or round bevel existing holes. And it can be used with water or not, very easy to operate.
No. 3
Diamond Finger Milling Bits,BRSCHNITT 1 Inch 25mm Dry Core Drill Bit with 5/8-11 Thread for Enlarging Shaping Existing Holes of Porcelain Tile Ceramic Marble Granite Countertop
  • ✔Size --1pc 1"(25mm), 50mm workable length, 5/8-11 Thread, Grit #45/50, toal Length 65mm
  • ✔Wide Applications --Recommended for enlarging, shaping and/or round bevel existing holes in porcelain tile, ceramics, bathroom tile,marble and countertop with ease,necessary to accomodate pipes or electric wire lines
  • ✔High Performance --This diamond milling bit helps to be durable and have a long sevice life , you could make hole smoothly with no wandering
  • ✔Cost-Effective --You could use only one size core bit and this finger bit to create different size of holes,which will save your money greatly!
  • ✔Machine --Angle grinder 5/8-11 Thread
SaleNo. 4
ZELCAN 10 Sizes Titanium Step Drill Bit, 1/4 to 1-3/8 Inches High Speed Steel Drill Cone Bits for Sheet Metal Hole Drilling Cutting, HSS Multi Size Hole Stepped Up Unibit for DIY Lovers Electrician
  • Durable HSS Drill Bit ----- High-speed steel makes it last longer than others, titanium coating ensure easily cut through iron sheets, aluminum sheets, copper & plastic & wood board and many other types of sheet metal with ease, and it can automatically deburr holes while drilling to keep the drill bit clean.
  • Titanium Coating ----- Coated with titanium, this step drill set performs well in heat, corrosion and rust resistance.
  • Revolutionary Design ----- Tri-flatted shank fits into power tools chuck securely and eliminates slip; two-flute design clears chips faster and allows particles to escape easily.
  • Includes 10 Step Sizes ----- 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8".
  • A Must-Have for Handyman or Professionals ----- Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper, iron and many other types of sheet metal (excluding steel or any other harder metal).
No. 5
GYTYCATAH Diamond Finger Milling Bits, 3/8" (10mm) Diamond Milling Bits for Holes Enlarging Shaping Trimming in Tile Marble Glass Granite Ceramic 5/8"-11 Threads (Yellow)
  • 【FUNCTION AND USED FOR】 This diamond finger bits are designed to enlarge, shape, trim and round bevel EXISTING HOLES in porcelain tile, marble, ceramic, granite, etc. And also suitable to easily shape side indentation required to pipes or electric wires.
  • 【YOUR CHOICE】 You can use our milling finger bit to expand existing holes to different sizes or shapes, no need to purchase several core drill bits. Great for granite, porcelain,ceramic or marble countertops, bathroom tiles.
  • 【PREMIUM MATERIAL】High hardness and heavily coated diamond with vacuum brazed technology ensure more effective working performance and precise hole finish. Durable metal and premium diamond provide longer working life.
  • 【SIZE】: Diameter: 3/8" (10mm), Workable Length: 2" (50mm), Total Length: 3" (75mm), Grit: #50/60.
  • 【ATTENTION】 The diamond milling bit is NOT RECOMMENDED FOR DRILLING HOLES, but for enlarging, shaping and trimming EXISTING HOLES. It fits on 5/8"-11 threads angle grinder and can be used with water or not, very easy to operate.
No. 6
Diamond Beveling Chamfer Bit 1-3/8" (35mm) Countersink Drill Bits for Existing Holes Enlarging Shaping Trimming in Tile Marble Glass Granite Ceramic W/ 5/8"-11 Thread & 3/8” Hex Shank Adapter
  • [Size]:Diameter: 1-3/8"(35mm), Threads: 5/8"-11, Chamfer Angle:Top Angle 53 degree, Total length: 45mm, Working Depth: 37mm, Hex Shank Adapter Dia: 3/8" (10mm)
  • [Multi-Functional ]:This diamond beveling chamfer bit can NOT be used to drill holes, Designed to enlarge, shape, and round bevel existing holes in porcelain, hard ceramic, granite, stones, marble, etc.
  • [Application]: The Diamond Chamfer Bit is with 5/8"-11 Thread for most Angle Grinders, this bit can enlarge the hole into any size between 0 to 1-3/8inch (0~35mm), a 3/8” Hex Shank Adapter also included in the package for most electric drills.
  • [Material]: This chamfer bit is made of premium diamond and durable metal, high strength and hardness, it can grind wet or dry, no chips, scratches or bumps, very useful to improve the edge finishing of exposed holes, provide a smooth, high-end finish.
  • [Service]: You can use just one size core bit to create different size of holes. Grinding hard materials will produce a lot of dust and noise, use goggles, ear plugs. whenever you have any questions, please feel free to contact us.
SaleNo. 7
Diamond Finger Milling Bit Ball End, 3/4 Inch 20mm Dia Dry Core Drill Bits Vacuum Brazed Hole Saws for Enlarging Shaping Holes in Porcelain Ceramic Tile Granite Marble Stone Brick with 5/8-11 Thread
  • Ball End Diamond Hole Enlarger Bit: Diamond Finger Milling Bit is ideal for elongating, enlarging, and shaping circular holes, draining holes in projects in bathroom or kitchen to fit tiles perfectly around faucets, shower valves and other pipes; Unique ball end bit can create pit decoration or make tapered holes
  • High Quality: This diamond finger bit is heavily diamond coated, both sides and the end, as a result, it can grind wet or dry, no chips, scratches or bumps, make beautiful holes; recommend to do some test holes in scrap to get the feel for it
  • Designed for Hard Materials: Work perfectly for enlarging or trimming holes in porcelain sink, limestone vanity sink top, ceramic bathroom sink, thick granite countertop, marble, stone,
  • Faster and More Durable: when upgrade or replace the bathrooms faucets, you may find the faucets are a bit larger than the old ones, using this Diamond Finger Milling Bit to enlarge the hole, you can save a lot of trouble and time
  • Easy to Use: 1 piece of 3/4 inch (20mm) Vacuum Brazed Diamond finger bit, hole depth up to 50mm, with 5/8-11 Thread to fit most angle grinders; please take your time and do not force the bit; Use goggles, ear plugs, and vacuum with it
No. 8
2” Diamond Beveling Chamfer Bit, 50mm Diamond Countersink Drill Bits Enlarging Trimming Holes in Porcelain Ceramic Granite Tiles with 5/8-11 Thread to 3/8” Hex Shank Adapter
  • 2 Inch Diamond Beveling Chamfer Bit Set - Designed to trim, enlarge, shape, bevel existing holes in Porcelain, Ceramic, Granite, Marble, Natural Stone, Glass Tiles; NOT for creating holes
  • Less is More – This one Vacuum Brazed Diamond Countersink Bit can chamfer perfect 60-degree holes diameter from 0.1” to 2" (50mm) in a fast manner, save time and money
  • Fit Most Tools – Dry Diamond Beveling Bit can be used on most speed variable angle grinders (5/8-11 thread) directly, or High-Speed power drills with the 3/8” Hex Shank Adaptor (included)
  • Applications – Perfect Diamond Chamfer bit for bathroom countertop tile fitting, tub grab installing, and kitchen draining and faucet fittings, creating beautiful hole edge profiles
  • Tips of Use - Dry Diamond Drill Bit prefer to be spun fast, the faster the better, because it will reduce heat buildup; allow it to cool in the process if your project needs a lot of holes
SaleNo. 9
Diamond Beveling Chamfer Bit, Countersink Drill Bit for 0-2" (50mm) Hole Enlarging Trimming in Porcelain, Ceramic Tiles W/ 5/8"-11 Thread for Angle Grinders ( with Hex Shank Adapter)
  • 【APPLICATION】-Diamond beveling chamfer bit designed to enlarge, shape and/or round bevel existing holes in Porcelain, Hard Ceramic, Granite and Marble.and it's also suitable to easily create round side indentation necessary to accomodate pipes or electric wire lines.
  • 【ATTENTION】-This diamond bit can NOT be used to drill holes,but to enlarge, shape and trim the existing holes.
  • 【SPECIFICATION】- Diameter : 50mm/2”. Threads : 5/8"-11. Grit : #80. Degree : 60°. Working Depth : 46mm.
  • 【MATERIAL】- This chamfer bit is made of premium diamond and durable metal.High hardness and strength. It uses these high quality raw materials to ensure more effective cleaning and trimming.Bring a smooth,beautiful hole finish.
  • 【EASY TO INSTALL】- The diamond countersink drill bits fit on 5/8"-11 threads angle grinder, can be used with water or not, very easy to operate.
No. 10
HIGHDRIL Diamond Milling Finger Bits - 25mm (1") Enlarging Shaping Grinding Holes, Dry Core Drill Bit for Porcelain,Hard Ceramic,Granite and Marble (Hexagonal Shank)
  • ✅Hexagonal shank, shank diameter 8.3mm, diamond diameter 25mm, diamond height 40mm, total length 65mm, diamond grit 50/60.
  • ✅Versatile Finger Bits designed to Enlarge, Shape and/or Round Bevel existing holes, and also can create and shape half-moon side indentations necessary to accomodate pipes or electric wire lines.
  • ✅Dry and wet use in Porcelain, Ceramic, Granite, Natural Stone, Stoneware, Marble, Tile, Single-fired tiles, Double fired Glazed tile, etc.
  • ✅Made from high quality steel, combined with vacuum brazing technology, this milling bit produces a sharp and durable effect.
  • ✅Suitable for electric drill, bench drill. Recommended speed2000-5000RPM.

How to choose a good hole enlarging drill bits

Does the idea of finding a fantastic hole enlarging drill bits make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in hole enlarging drill bits. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top hole enlarging drill bits products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top hole enlarging drill bits on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top hole enlarging drill bits brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top hole enlarging drill bits based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the hole enlarging drill bits were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good hole enlarging drill bits, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your hole enlarging drill bits.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting hole enlarging drill bits for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our hole enlarging drill bits. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what hole enlarging drill bits should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on hole enlarging drill bits.