This Irwin impact screwdriver bit set is engineered for use with high-torque impact drivers, offering enhanced durability and precision. Each bit is constructed from heavy-duty, high-grade steel, providing three times the lifespan of standard bits to withstand demanding tasks. The precision tip geometry ensures a secure fit, which helps minimize stripping and cam-out during operation. These bits feature a Power Groove design, allowing for compatibility with the Irwin Impact Performance Series magnetic screw-hold attachment. The five-piece set includes two PZ2 bits, two PH2 bits, and one T20 bit, all housed in a durable moulded ABS resin case for organized storage and accessibility.