For thin gauge material and sheet metal These drill bits have short flutes as well as a short overall length for maximum rigidity when drilling in sheet metalThey are made with a cobalt blend for a longer life. Product Information Brand WALTER Part # 01J001 Drill Size 1 Flute Length 1-1/8 Inch Length 2-5/8 Inch Origin Country CN Product Type Stub Drill Bits Shank 0.2280 Inch Size #1 Product InformationMade with premium grade cobalt HSS to drill harder materials Cobalt drills can drill approximately 30% faster than HSS drills Self centering 135 degree split-point for reduced thrust requirements and minimized walking Special bronze SST surface treatmeSuggested ApplicationDrilling into sheet metal Drilling of round surfaces Drilling with stationary machines