IRWIN® Phillips Insert Bits are manufactured from industrial-grade S2 steel for long life and durability. Engineered for use in hand-driving applications or with power tools when used with the IRWIN® insert bit holder.Select Option PH1 25mm Pack of 2PH2 25mm Pack of 10PH2 25mm Pack of 2PH2 50mm Pack of 2 Add to Basket Quantity