Step Drill Bit Set 4-20mm & 5-35mm 3pc Auto Centre Punch

A 3-piece step drill bit set for making clean, stepped holes in a range of thin materials. It includes two HSS coated step drills covering 4-20mm and 5-35mm, along with an automatic centre punch to help mark the drilling point before starting.

Used for sheet metal work, electrical fitting, garage jobs, workshop use and general DIY repairs, this set suits anyone drilling through aluminium, steel sheet, copper, plastic or wood. The stepped drill design is handy when you need different hole sizes from one bit, whether you are enlarging existing holes, fitting cable entries, working on panels or carrying out vehicle maintenance and fabrication tasks.

The two drill bits give a useful spread of sizes for common drilling jobs, while the HSS coated finish helps them cope with repeated use on suitable materials. The automatic centre punch is spring loaded and delivers a high impact strike, which helps start holes more accurately without needing a hammer. That makes the set easier to use when marking sheet material, especially where a drill bit could otherwise wander across the surface. With two size ranges included, it also helps reduce swapping between separate drill bits during regular workshop and maintenance work.

Step drill bit set specifications

• Contents: Two step drill bits and one automatic centre punch.
• Size range: Step drills cover 4-20mm and 5-35mm.
• Material use: Suitable for aluminium, steel sheet, copper, plastic and wood.
• Finish: HSS coated step drills for practical drilling work.
• Function: Spring loaded centre punch gives a high impact strike for marking the drilling point.

A practical choice for regular drilling, fitting and repair work.