Irwin 73631 Jobber Drill Bit, 31/64 in Dia, 5-7/8 in OAL, Spiral Flute, 31/64 in Dia Shank, Reduced Shank

High-speed steel features a black body and gold flute Turbomax tip for burr-free holes; 3/8 in reduced shank fits all 3/8 in drills. Exact centering; no walking on straight and curved surfaces. A 3-flatted shank on 3/16 in and above for better chuck grip. Jobber length.