HSS TiN coated step drill 3/16-7/8", straight double fluted, 12 steps(3/16",1/4",5/16",3/8",7/16",1/2",9/16",5/8",11/16",3/4",13/16" and 7/8"), shank:3/8", nw:71g
Suitable for drilling thin metals steel, aluminum, copper, brass, fiberglass, PVC…
No pilot holes or pre-drilling required