The IRWIN® Impact Pro Performance Bit Set has been engineered for maximum durability and turning force when used in extreme applications. The full fit head eliminates wobble and screw head roundings. With a contoured area, so the bit tip flexes with the torque of the impact driver. Flex optimised to transfer maximum torque through the screw and maximise life. Supplied in a robust, modular storage case. Contains: 7 x 57mm Phillips Bits: PH1(x2), PH2(x4), PH38 x 57mm Pozi Bits: PZ1(x2), PZ2(x5), PZ37 x 57mm TORX Bits: TX20(x4), TX30(x3) IRWIN Impact Pro Performance Bit Set, 22 Piece