The Irwin Double Ended Phillips Impact Screwdriving Bits are specifically engineered for use in high torque Impact Drivers. They are manufactured from heavy-duty, high-grade steel and have a 3x increased bit life compared to standard screwdriver bits. The screwdriver bits have precision tip geometry that delivers superior fitment, reducing stripping and cam-out. They have a Power Groove design for compatibility with the IRWIN Impact Performance Series Magnetic Screw-Hold Attachment. These bits feature DoubleLok Technology, which ensures that both ends of the bit lock securely in impact drivers and quick-change chucks, enabling use of two tips from one bit for added convenience and extended life. Specifications:Tips: PH2.Length: 60mm. Pack quantity: 2. IRWIN Impact Double Ended Screwdriver Bits Phillips Ph2 60Mm Pack Of 2 in Black