HSS TiN coated step drill 1/8-1/2", straight double fluted, 13 steps(1/8",5/32",3/16", 7/32",1/4",9/32",5/16",11/32",3/8",13/32",7/16",15/32" and 1/2"), shank:1/4", nw:26g
Suitable for drilling thin metals steel, aluminum, copper, brass, fiberglass, PVC…
No pilot holes or pre-drilling required