Irwin Impact Performance Series is drilling， driving and extracting accessories are designed for impact drivers. Precision tip geometry delivers superior fitment， reducing stripping and cam out. While most screw driving bits are simply compatible with impact drills and drivers， Irwin Impact Performance Series fastener drive bits are engineered for maximum durability and long life with impact drivers. these bits fit fasteners more precisely， which reduces stripping and increases the life of the bit itself Irwin's Impact Performance Series bits have 3x longer life than traditional bits.