IRWIN® Phillips Power 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. Power bits are specifically designed for the higher torque requirements of power tools. They are designed to provide more clearance between the power tool and the fastener.Select Option PH2 50mm (Pack 2)PH2 70mm Pack of 1PH2 90mm Pack of 1 Add to Basket Quantity