The Century Drill & Tool 3/16 in. x 2-7/8 in. Cobalt Steel Stubby Drill Bit is engineered for high-performance drilling in tough metals and alloys. Its short, stubby design increases rigidity and reduces chatter, delivering accurate, clean holes in stainless steel, cast iron, and other hard materials. Built with a straight shank for reliable grip in chucks, this drill bit offers strength and durability for demanding metalworking tasks. Left hand stub drill bit for removal of right hand threaded broken bolts or studs without tightening Use with screw extractors for those hard to remove bolts or studs Industrial polished finished with 135-deg. split point Made from premium cobalt steel