Product name: Step power drill bit
Item NO.: DF4046
Item NO.: DF4046
Material:
HSS/quality carbon steel
accept customers' require.
Size(mm):
51-5; 38-5.5; 38-5; 38-4; 32-5
Step drill bit - a drill bit with a graduated design that permits drilling of variously sized holes without changing bits. It is designed for use with power drills and have self-starting tips that eliminate the need for center punching. Step bits can be used on all materials but are specially designed for use on metals.