IRWIN 10502854 Step Drill 5mm to 35mm (13 Steps in 2 to 3mm Increments)

This Irwin step drill bit has been designed to enlarge a hole as the bit drills cleanly and accurately through the surface.

Use this step drill bit for precision drilling of holes up to 35mm diameter in steel, brass, copper, aluminium, wood and plastic sheets.

* Enlarges holes in 2 to 3mm steps * 13 steps from 5 to 35mm * Single flute for maximum drilling control into sheet metal * Unique flute design ensures perfect round holes in sheet metal * Self-centring point - will not walk - eliminates centre punching * Made from industrial grade M7 high speed steel * Flatted shank prevents the drill bit from slipping in the chuck