Best Square Drill Bits of 2026

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 10 Feb 2026

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Square drill bits are a type of drill bit that are designed with a square-shaped tip instead of the traditional round one. These bits are commonly used for woodworking and other construction projects where precision and accuracy are important. They are designed to fit into square-shaped holes and provide a clean and precise cut. Square drill bits are available in a range of sizes and are made from a variety of materials, including high-speed steel and carbide. They are a useful addition to any DIY enthusiast or professional's toolkit.

At a Glance: Our Top Picks

20mm Bearing Steel Square Hole Drill Bit Cover #TOP 1
20mm Bearing Steel Square Hole Drill Bit
ftb score rating icon 9.9
DEWALT FLEXTORQ 5-Piece Bit Set for Impact Drivers Cover #TOP 2
DEWALT FLEXTORQ 5-Piece Bit Set for Impact Drivers
ftb score rating icon 9.8
Uxcell 4pcs Square Hole Drill Bits Set Cover #TOP 3
Uxcell 4pcs Square Hole Drill Bits Set
ftb score rating icon 9.6

Top 3 Square Drill Bits

#TOP 1

20mm Bearing Steel Square Hole Drill Bit

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20mm Bearing Steel Square Hole Drill Bit Cover
Woodworking Square Hole Drill Bit, 20mm Bearing Steel Mortising Chisel Hole Saw Drill Bitfor Wood Products

The Ejoyous Square Hole Drill Bit is crafted from excellent bearing steel, ensuring high hardness and durability. This makes it ideal for users seeking a long-lasting drill bit. Its stable performance is enhanced by a universal handle shape and circular end design, ensuring better clamping and ease of use. The efficient U-shaped long chip drain grooves facilitate effective wood chip discharge, significantly improving your drilling efficiency. Moreover, the enhanced protection features prevent cracking, ensuring that your drilling tasks are smooth and reliable.

What We Like
Durable bearing steel construction
Stable clamping design
Improved drilling efficiency
Crack-resistant drill sleeve
#TOP 2

DEWALT FLEXTORQ 5-Piece Bit Set for Impact Drivers

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Black/White
One Size
DEWALT FLEXTORQ 5-Piece Bit Set for Impact Drivers Cover
DEWALT FLEXTORQ 5-Piece Square Drill Bit Set #2, Robertson 1/4" x 3-1/2" for Impact Drivers and Drills, Hex Shank (DWAF3SQ2IR5)

The DEWALT FLEXTORQ Bit Set is designed for durability and efficiency. Its FLEXTORQ zone absorbs impact, ensuring a longer life even in tough applications. You will benefit from the revised Robertson Square Geometry, which allows you to drive 100% more screws per bit, reducing the need for frequent replacements. The quick bit identification feature, with laser-etched size markers, helps you easily find the right bit without wasting time. Additionally, the #2 square head fits screw sizes 8-10, making it versatile for various projects.

What We Like
Longer life in tough applications
100% more screws per bit
Quick and easy bit identification
Versatile for different screw sizes
#TOP 3

Uxcell 4pcs Square Hole Drill Bits Set

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Uxcell 4pcs Square Hole Drill Bits Set Cover
uxcell 4pcs Square Hole Drill Bit for Wood 1/2", 1/4", 3/8", 5/16" Hollow Chisel Mortiser Auger Spur Cutter Tool, High Carbon Steel for Woodworking Carpentry

The Uxcell Square Hole Drill Bits offer a versatile set designed for woodworking. With four different sizes, ranging from 1/4 inch to 1/2 inch, you can tackle a variety of projects efficiently. The specially designed tip and four cutting edges ensure fast drilling with minimal resistance, allowing you to create precise openings in wood effortlessly. Made from high-carbon steel, these bits provide impressive durability and sharpness, making them a reliable choice for carpentry tasks.

What We Like
Multiple size options available
Fast and efficient drilling
Durable high-carbon steel material
Reduces labour intensity
Buying Guide Image
Editor's Notes

During our square drill bit research, we found 306 square drill bit products and shortlisted 3 quality products. We collected and analyzed 2,871 customer reviews through our big data system to write the square drill bits list. We found that most customers choose square drill bits with an average price of £13.23.

The square drill bits are available for purchase. We have researched hundreds of brands and picked the top brands of square drill bits, including Ejoyous, DEWALT, Uxcell.

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.