3 Professional quality HSS step drills ideal for drilling holes into steel, copper, aluminium or plastic.
Double flutes, Automatically deburrs as you drill, Self starting penetrate, No working and no pilot needed.
Sizes:
4 - 12mm in 2mm increments - 5 step drill
4 - 22mm in 2mm increments - 10 step drill
4 - 32mm in 2mm increments - 15 step drill