Irwin Pozi 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 1/4 inch hex body and made from high grade S2 steel.
1/4 inch Hex

The Irwin IRW10504398 Screwdriver Bits come in the following:
Pack of 2
Pozidriv PZ2 x 25mm long.