A versatile HSS step drill bit set for drilling multiple hole sizes in sheet metal, aluminium, brass, copper, plastic and other thin materials. Includes three titanium-coated spiral step drills, an automatic centre punch and a protective storage case.

Product Overview

The Right Lines HSS Titanium Step Drill Bit Set provides a fast and convenient way to drill multiple hole diameters without constantly changing drill bits.

The set includes three step drills covering sizes from 4mm to 32mm. Each drill is manufactured from high-speed steel and features a titanium-coated finish for improved wear resistance and smoother cutting.

The two-flute spiral design helps remove material efficiently while providing smooth, controlled drilling. The stepped profile can also help deburr and chamfer the hole as it progresses through the material.

A 1/4" (6.35mm) hex shank provides a secure fit in compatible drills and tool holders. The hex design also helps reduce slipping inside the chuck.

Supplied with an automatic centre punch and a durable plastic storage case, this is a practical set for workshops, fabrication, automotive repairs and general DIY work.

🔩 Key Features

• 3-piece HSS step drill bit set
• Drilling range from 4mm to 32mm
• Titanium-coated finish
• High-speed steel construction
• Two-flute spiral groove design
• Fast and efficient material removal
• Helps produce smooth, clean holes
• Stepped design allows multiple hole sizes
• 1/4" (6.35mm) hex shanks
• Hex shank helps reduce chuck slippage
• Includes automatic centre punch
• Supplied in a protective plastic storage case

Set Contents

Step Drill Bits

• 1 x 4–12mm step drill
• 1 x 4–20mm step drill
• 1 x 4–32mm step drill

Accessories

• 1 x automatic centre punch
• 1 x plastic storage case

⚙️ Suitable Materials

Suitable for drilling thin materials including:

• Sheet steel
• Aluminium
• Brass
• Copper
• Plastic
• PVC board
• Insulation board
• Thin wood up to approximately 5mm

Material suitability will depend on thickness, drill speed and the correct use of cutting lubricant where required.

🔧 Applications

Ideal for:

• Sheet metal fabrication
• Automotive repairs
• Electrical installations
• Plumbing work
• Metalworking
• Workshop maintenance
• Enlarging existing holes
• Panel fabrication
• DIY projects
• General engineering tasks

🌀 Two-Flute Spiral Design

The spiral flute design provides efficient chip removal while drilling.

This helps produce smoother holes and provides improved control compared with conventional straight-flute designs.

💪 HSS with Titanium-Coated Finish

The high-speed steel construction provides strength and durability for regular workshop use.

The titanium-coated surface improves wear resistance and reduces friction during cutting.

📏 Multiple Hole Sizes with One Bit

Each step allows a different diameter to be drilled without changing tools.

With three drill bits covering sizes up to 32mm, the set provides a versatile solution for a wide range of hole-making tasks.

🔩 1/4" Hex Shank

Each drill features a 1/4" (6.35mm) hex shank for secure fitting in compatible drill chucks and hex tool holders.

The hexagonal profile helps reduce slipping during use.

Step Drill Speed Guidance

Correct drilling speed will depend on the material and the diameter being drilled.

Start Slowly

Begin drilling at a low speed to establish the hole accurately. Increase speed gradually where appropriate.

Reduce Speed for Larger Diameters

As the drill progresses to larger steps, reduce the RPM. This helps maintain control and prevents excessive heat build-up.

Match the Speed to the Material

Softer materials such as plastic and aluminium can generally be drilled differently from harder materials such as steel.

Always adjust the drill speed to suit the material being worked.

Use Cutting Lubricant When Required

Suitable cutting fluid can reduce heat and friction when drilling metals. This can improve cutting performance and extend drill bit life.

Hand Drill or Drill Press

A drill press can provide greater stability and more consistent pressure.

When using a handheld drill, maintain a firm grip and avoid excessive pressure.

✅ Why Choose Right Lines?

The Right Lines HSS Step Drill Bit Set combines versatility, durability and convenience in one compact kit.

With three drilling ranges, spiral flutes, titanium-coated HSS construction and an automatic centre punch, it is ideal for professional workshops, tradespeople and DIY