HSS Double End Drill Bits HSS Double End Drill BitsProduct Description:1. HSS Twist Drill Bits, Double Ended2. Fully Ground3.4341, 9341, M2, ... or breaks, it can be quickly reversed in drill chuck to reduce change-over time, overall costs, ... For drilling in steel, cast steel, malleable iron, sintered metal, non-ferrous metal and plastic. Dia.Working LengthOverall ... 301/21-13/16 HSS Double End Drill Bits