Impact Performance Series Fastener Driver #1 Square, Insert Bit, 1-inch, 2-piece

Irwin® Impact Performance Series™ fastener drive bits are engineered for maximum durability and long life with impact drivers. Insert and power bits are designed with precision tip geometry so they fit fasteners more precisely, which reduces stripping and cam-out. Insert bits fit standard C-ring design bit holders and Power Bits fit ¼" quick-change driver adapters.