Turbo Drill Bit 3/16 inch, Jobber Length Turbomax 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 flute3/16 in. diameter, 2-5/16 in. twist length, 3-1/2 in. overall lengthThree flatted shank on 3/16 in. and above for better chuck grip3-1/2 in. overall length2-5/16 in. flute length3/16 in. size drill bit