Best Round Step Bits of 2025

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 1 Feb 2025

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Round step bits are a type of drilling tool designed to create perfectly round holes in various materials such as metal, wood, and plastic. These bits feature a stepped design that gradually increases in size, allowing users to drill holes of varying diameters with a single tool. They are commonly used in electrical and plumbing applications, as well as in DIY projects. With their high-speed steel construction and precision-ground tips, round step bits offer reliable and accurate performance. They are a versatile and useful addition to any toolkit.

At a Glance: Our Top Picks

CUKCIC Step Drill Bit 6-60mm HSS 4241 Cover #TOP 1
CUKCIC Step Drill Bit 6-60mm HSS 4241
ftb score rating icon 9.9
HSS Step Cone Drill Bit 4-42mm Tool Cover #TOP 2
HSS Step Cone Drill Bit 4-42mm Tool
ftb score rating icon 9.8
High-Speed Steel Spiral Step Drill Bit Set Cover #TOP 3
High-Speed Steel Spiral Step Drill Bit Set
ftb score rating icon 9.6

Top 7 Round Step Bits

#TOP 1

CUKCIC Step Drill Bit 6-60mm HSS 4241

CUKCIC Step Drill Bit 6-60mm HSS 4241 Cover
CUKCIC Step Drill Bit HSS 4241 Spiral Grooved Slot Round Shank Cone Drill 6-60mm

The CUKCIC Step Drill Bit is designed to handle a range of materials with ease. With a size range of 6-60mm across 12 steps, it caters to various drilling needs. Made from HSS 4241, it offers high hardness for durability. This bit is suitable for softer workpieces, such as carbon steel and wood, with a thickness of up to 5mm. Additionally, using water cooling while drilling can prolong the bit's life, making it a practical choice for your projects.

What We Like
Versatile size range
High durability material
Suitable for soft materials
Water cooling extends life
Self-centering design
#TOP 2

HSS Step Cone Drill Bit 4-42mm Tool

B07XBL21KF
HSS Step Cone Drill Bit 4-42mm Tool Cover
HSS Step Cone Drill Bit - 4-42mm 14 Sizes Round Shank Hole Cutter Tool High Speed Steel

The RASHION Step Cone Drill is crafted from high-speed steel, ensuring durability and efficient drilling. This tool features an automatic deburring function, allowing you to create clean holes without the extra step of manual deburring. Its surface is treated with nitrogen, which enhances hardness and abrasion resistance, making it suitable for tough materials. You can confidently use it on thin iron plates, aluminium, insulation panels, and PVC panels up to 4mm thick, providing you with a versatile solution for various drilling tasks.

What We Like
High-speed steel construction
Automatic deburring function
Nitrogen surface treatment
Versatile application
14 sizes available
#TOP 3

High-Speed Steel Spiral Step Drill Bit Set

High-Speed Steel Spiral Step Drill Bit Set Cover
Spiral Step Drill Bit, Titanium Nitride Coating High-Speed Steel, 3pcs Black 4-12mm/4-20mm/4-32mm Triangle Round Shank Groove Cone, Drilling Tools

The Nityunn Step Drill Bits are crafted from heat-treated high-speed steel with a titanium nitride coating, ensuring reduced friction and an extended service life. The spiral flutes and triangular round shaft design allow for faster, more stable cutting, making your drilling tasks smoother and more efficient. With 29 sizes available across three bits, you can tackle various projects with ease, saving you time and effort. These bits are perfect for softer materials like PVC, wood, and iron, ensuring versatility in your toolkit.

What We Like
Durable titanium nitride coating
29 versatile sizes available
Faster and smoother cutting
Easy to use with power tools

Gunpla 3 Piece Titanium Coated Drill Bits Set

#030122
3 Piece
Gunpla 3 Piece Titanium Coated Drill Bits Set Cover
Gunpla 3 Piece HSS Spiral Step Drill Bits Set, Titanium Coated Hex Shank Drilling Bit Kit for Wood, Stainless Steel, Iron Plate, Aluminum, PVC Board 4mm to 32mm

The Gunpla Step Drill Bits set features high-speed steel bits coated with titanium, ensuring durability and longevity. The three spiral step drill bits allow for faster and smoother cutting, making your drilling tasks more efficient. With a hex shank, these bits offer versatility across various materials, from wood to metal. Additionally, the two-flute design helps automatically deburr holes, providing cleaner results and preventing any wandering during use, so you can work with precision and ease.

What We Like
Durable titanium coating
Fast, smooth cutting
Versatile for multiple materials
Automatically deburrs holes
#TOP 5

Wanjorlay HSS Step Drill Bit Set 4-42 mm

Wanjorlay
330210
Golden
Wanjorlay HSS Step Drill Bit Set 4-42 mm Cover
Wanjorlay HSS Step Drill Bit - 4-42 mm 14 Sizes Round Shank Hole Cutting Tool Quick Working Steel

The Wanjorlay Step Drill Bit offers excellent durability as it is made from high-speed steel, ensuring it lasts through numerous jobs. It automatically deburrs holes while drilling, which saves you time and effort in finishing your work. The nitrogen treatment enhances its hardness and abrasion resistance, making it ideal for various materials. With 14 different sizes ranging from 4 to 42 mm, this tool provides versatility for cutting holes in materials such as steel and PVC boards, catering to a wide range of projects.

What We Like
Durable high-speed steel construction
Automatically deburrs holes
Nitrogen treated for durability
14 versatile sizes available
Suitable for various materials
#TOP 6

Dtacke 10mm-45mm Step Drill Bit Set

Dtacke 10mm-45mm Step Drill Bit Set Cover
Dtacke Metric 10mm-45mm/0.39"-1.77" Triangle Round Handle Step Drill Bit Set Titanium Coated Pagoda Hole Drilling Bit for Wood Metal Steel

The Dtacke Step Drill Bits are designed for versatility, featuring a range of sizes from 10mm to 45mm. This set is made from HSS4241 material, ideal for use on softer materials like carbon steel. The titanium coating reduces friction and heat, ensuring smoother operation during use. With its two flute design, you can enjoy enhanced cutting efficiency, making your drilling tasks quicker and easier. Perfect for various projects, these bits are a valuable addition to your toolkit.

What We Like
Versatile size range
Titanium coating reduces friction
Smoother cutting with two flutes
Ideal for softer materials
Convenient for various projects
#TOP 7

KATUR M35 Step Drill Bit Set 4-32mm

BT-5324-Stra
KATUR M35 Step Drill Bit Set 4-32mm Cover
KATUR Step Drill Bit Large Co M35 10mm Triangle Round Shank Step Cone Drill Bit Hole Cutter Set Fluted Edge Step Drill 15 Sizes 4-32mm

The KATUR Step Drill Bit offers an efficient solution by replacing 15 individual drill bits with a single tool that ranges from 4-32mm. Its high-speed steel construction, enhanced with a titanium coating, ensures excellent durability and sharpness, making your drilling tasks smoother and more efficient. The hex shank design prevents slippage during operation, providing stability as you work. Additionally, its two-flute design allows for faster cutting with less pressure, perfect for users looking to punch holes through various materials like metal and wood.

What We Like
Replaces 15 individual bits
Durable titanium-coated steel
Stable hex shank design
Faster, smoother cutting
Versatile for multiple materials
Buying Guide Image
Editor's Notes

During our round step bit research, we found 82 round step bit products and shortlisted 7 quality products. We collected and analyzed 5,402 customer reviews through our big data system to write the round step bits list. We found that most customers choose round step bits with an average price of £13.50.

The round step bits are available for purchase. We have researched hundreds of brands and picked the top brands of round step bits, including CUKCIC, RASHION, Nityunn, Gunpla, Wanjorlay. The seller of top 1 product has received honest feedback from 130 consumers with an average rating of 4.8.

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.