13/64 inch Turbomax Drill Bit High speed steel fea Revolutionary tip design stays sharper longer and drills up to 10x faster than other leading drill bitsThree-flatted shank design provides better chuck grip and reduces slippage. Ideal for use in keyless chucksHigh speed steel features a black body and gold flute13/64 in. diameter, 2-7/16 in. twist length, 3-5/8 in. overall lengthThree flatted shank on 3/16 in. and above for better chuck grip3-5/8 in. overall length2-7/16 in. flute length13/64 in. size drill bit