31/64 hss frac drill bit. General-purpose high-speed steel (HSS), fractional, 3/8" reduced shank, jobber length drill bits. Bit is constructed of M-1 HSS for the best combination of strength, heat resistance, and wear resistance. Shank is reduced to 3/8" to fit in a 3/8" drill. Drill bits have a bright finish and a 118 point. Can be used in metal, wood, or plastic. 1 per card. 31/64", flute length 4-3/8", overall length 5-7/8"