Impact Driver Bits Application - Tools Impact Fastening Tool Tip Size T20 Hex Shank Size 1/4 in Overall Bit Length 1 in Bit Style Torx Shank Style Torx(TM) Fastening Tool Material Alloy Steel Single End/Double End Double End Includes (2) 1 in Impact Tough Torx #20 Insert Bits SAE or Metric SAE Impact Rated Yes Insert Bit Package Quantity 2