High speed steel features a Black body and Gold flute, 3/8"" reduced shank fits all 3/8"" drills, Self-centering Jet Point tip for clean entry and fast starts; stays sharp longer, Three flatted shank on 3/16"" and above for better chuck grip, Cutting Diam: 7/16 in, Flute Length: 4-1/16 in, Overall Length: 5-1/2 in, Applications: High performance metal drilling for portable drill users, Finish: Black Oxide, Gold Oxide, Point Shape: Jet Point, Type: HSS Drill Bit, SKU: EGLT19683