Best Diamond Boring Bits of 2026

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 5 Feb 2026

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Diamond Boring Bits are high-quality drilling tools designed for use in challenging drilling applications. These bits are equipped with diamond-tipped blades that offer superior cutting performance and durability compared to traditional boring bits. They are suitable for use in a wide range of materials, including concrete, stone, and asphalt. Diamond Boring Bits are an excellent choice for professionals in the construction and mining industries who require reliable and efficient drilling tools to get the job done.

At a Glance: Our Top Picks

BRSCHNITT Diamond Tile Hole Cutter Set Cover #TOP 1
BRSCHNITT Diamond Tile Hole Cutter Set
ftb score rating icon 9.9
DEWALT 1-3/8-Inch Diamond Drill Bit Cover #TOP 2
DEWALT 1-3/8-Inch Diamond Drill Bit
ftb score rating icon 9.8
M14 Diamond Drill Bit Set for Tiles Cover #TOP 3
M14 Diamond Drill Bit Set for Tiles
ftb score rating icon 9.6

Top 5 Diamond Boring Bits

#TOP 1

BRSCHNITT Diamond Tile Hole Cutter Set

BDB02910201R105
silver
KIT16
BRSCHNITT Diamond Tile Hole Cutter Set Cover
BRSCHNITT Diamond Tile Hole Cutter for Porcelain Ceramic Marble Granite Drilling, 6/8/10/20/25/35/50mm Chamfer bit & Finger bit with M14 Thread & Adapter

The BRSCHNITT Tile Cutter is a versatile tool designed for drilling through various materials, including porcelain, ceramic, marble, and granite. With a selection of diamond drill bits ranging from 6mm to 50mm, you can tackle different hole sizes with ease. The diamond height of 10mm ensures durability, while the option to use water during drilling extends the tool's lifespan significantly. It's suitable for use with angle grinders, providing you with a powerful solution for your home improvement projects.

What We Like
Multiple drill bit sizes available
Durable diamond construction
Extends tool lifespan with water
Works on various materials
Compatible with angle grinders
#TOP 2

DEWALT 1-3/8-Inch Diamond Drill Bit

DW5586
DEWALT 1-3/8-Inch Diamond Drill Bit Cover
DEWALT DW5586 1-3/8-Inch Diamond Drill Bit

The DEWALT Diamond Drill Bit boasts a diameter of 1-3/8 inches, making it perfect for various drilling tasks. With a drilling length of 1/4 inch and an overall length of 3 inches, it is designed for efficient use in tight spaces. The core ejection slot allows you to easily remove plugs, making it ideal for repetitious holes. Additionally, the reverse spiral thread ensures a continuous water feed, which not only increases drilling speeds but also prolongs the bit's life, giving you a reliable tool for your projects.

What We Like
Durable diamond welded tip
Efficient core ejection slot
Continuous water feed
Suitable for repeated drilling
Compact size for tight spaces
#TOP 3

M14 Diamond Drill Bit Set for Tiles

XIIW-1239
Black
M14 Diamond Drill Bit Set for Tiles Cover
7-Piece Tile Drill Bit M14 x 10 mm Diamond Drill Bit 20-68 mm + 125 mm Cutting Disc for Angle Grinder Hole Saw Set Tiles Granite Porcelain Stoneware Ceramic Masonry Wet/Dry Drill Bit Tile Drill Bit

The XIIW Diamond Drill Bits are designed for efficient drilling in various materials, including tiles, granite, and porcelain. The M14 connection allows for easy compatibility with standard angle grinders, making it a must-have for tilers. With a remarkable drilling speed of 10 to 15 seconds for porcelain stoneware, you can complete your projects quickly. Additionally, this premium dry drill bit boasts a service life five times longer than conventional options, ensuring durability and value for your work.

What We Like
Efficient dry drilling
Fast drilling speeds
Long-lasting durability
Compatible with standard grinders
Versatile for multiple materials

EDiamondTools Wet Drill Core Bit for Hard Materials

WBP0414A4
4-1/4 Inches
EDiamondTools Wet Drill Core Bit for Hard Materials Cover
Wet Drill Core Bits for Hard Concrete, Brick, and Block - 4.25" Diameter 1-1/4"-7 Threaded #30/40 Diamond Grits

The EDiamondTools Core Bit is a versatile tool designed for drilling through hard concrete, brick, and block, making it ideal for various construction tasks. Its heavy-duty construction features a high concentration of embedded diamonds, ensuring a longer lifespan and efficient drilling. With a substantial drilling depth of 14 inches, you can tackle deeper projects with ease. The 1-1/4"-7 threaded arbor allows for secure attachment to your drilling equipment, providing you with a reliable and robust drilling experience.

What We Like
Excellent for hard materials
Longer core life
Impressive drilling depth
Secure threaded arbor
Versatile and multipurpose
#TOP 5

Amana Tool 46123 1/2 Inch Plastic Cutting Router Bit

46123
Amana Tool 46123 1/2 Inch Plastic Cutting Router Bit Cover
Amana Tool 46123 Abrasive Type Plunge Diamond Pattern, Plastic Cutting 1/2 D x 2-1/8 CH x 1/2 SHK x 4 Inch Long Router Bit

The Amana Tool 46123 Bit is designed with a 1/2-inch diameter, making it ideal for precise and controlled cuts in plastic materials. Its 2-1/8 inch cutting height allows you to work on deeper cuts, providing flexibility for various projects. The 1/2-inch shank ensures a secure fit in your router, helping to reduce vibrations and improve accuracy. With an overall length of 4 inches, this bit offers a good balance between reach and control, making it a reliable choice for your routing needs.

What We Like
Durable 1/2-inch diameter
Deep 2-1/8 inch cutting height
Secure 1/2-inch shank fit
Good overall length for control
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Are diamond drill bits real diamonds?

2. How Are Diamond Drill Bits Made? To manufacture these drill bits, producers use the pressure of up to 1.5 GPa and temperature of about 1250 degrees (Celsius). The makeup of these drill bits consists of real diamond powder, pressed onto the steel using this very high pressure.

2. What are diamond bits used for?

Diamond drill bits are perfect for drilling holes through hard materials such as these: Glass, sea glass, beach glass, fused glass, sheet glass. Stone, gemstones, rock, pebbles, minerals. Ceramic, porcelain, tiles, glazed pottery, plates, china.

3. What are diamond Dremel bits used for?

Diamond drill bits are for drilling holes in hard materials such as glass, stone, ceramic, bone, shell, pottery and china.

4. What is a diamond core bit?

Diamond core bits are used for drilling holes in hard and soft materials with or without steel reinforcing, such as cured and reinforced concrete, pre-stressed concrete, asphalt, brick, block, stone for air-conditioning, water pipe, gas nozzles, electric switches in walls and floors.

Editor's Notes

During our diamond boring bit research, we found 18 diamond boring bit products and shortlisted 5 quality products. We collected and analyzed 9,954 customer reviews through our big data system to write the diamond boring bits list. We found that most customers choose diamond boring bits with an average price of £78.27.

The diamond boring bits are available for purchase. We have researched hundreds of brands and picked the top brands of diamond boring bits, including BRSCHNITT, DEWALT, XIIW, EDiamondTools, Amana Tool.

Written by
Jennifer Fraser Avatar

Jennifer Fraser is a licensed contractor specializing in sales, maintenance, and kitchen, bathroom, and home appliances, tools, and utilities. She owns a store in Leeds where you can get any home and tool appliance. Jenny has a degree in literature, but she combines her knowledge and experience with her degree to publish DIY articles on solving home appliances issues to keep up the family enterprise.