Irwin IRW10504347 Screwdriver Bits Hex 4.0 x 25mm (Pack 10) Irwin Hex insert screwdriver bits engineered for use in hand-driving applications or with power tools designed for use in insert holder with C-clip for retaining ring notch. Compact and versatile with a 1/4in hex body and made from high grade S2 steel Packs of 10 Hex bit 4 x 25mm
