US PRO 7142 3pc HSS-G+ Spiral Step Drill Set 4 to 32mm

The US PRO 7142 3pc HSS-G+ Spiral Step Drill Set is designed for accurate, controlled drilling in thin materials where multiple hole sizes are required. Covering a wide range from 4mm up to 32mm, this set allows holes to be enlarged progressively without changing drill bits, saving time and improving consistency on the job.

Each drill is precision manufactured from high quality HSS-G+ high speed steel and heat treated to increase hardness and durability. The spiral step design ensures smoother cutting action and efficient chip removal, helping to reduce heat build-up and deliver cleaner holes, particularly in sheet materials.

The set includes three step drills with overlapping size ranges, providing excellent flexibility for workshop, fabrication, electrical, automotive, and general maintenance applications. All drills feature a 3-flat shank, offering improved grip in the chuck and reducing the risk of slippage during use.

Ideal for non-ferrous metals, sheet metal and PVC, this compact set is supplied in a durable storage case to keep the drills protected and organised when not in use.

What’s Included

Drill 1

• Stepped sizes: 4, 6, 8, 10, 12mm
• Shank diameter: 6mm
• Shank length: 22mm
• Overall length: 62mm

Drill 2

• Stepped sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20mm
• Shank diameter: 8mm
• Shank length: 22mm
• Overall length: 73mm

Drill 3

• Stepped sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm
• Shank diameter: 10mm
• Shank length: 22mm
• Overall length: 102mm

Key Features

• 3 piece spiral step drill set covering 4mm to 32mm

• Manufactured from HSS-G+ high speed steel

• Heat treated for increased hardness and long service life

• Spiral step design for smoother cutting and better swarf removal

• 3-flat shanks for secure grip in the chuck

• Suitable for non-ferrous metals, sheet metal and PVC