The Irwin Impact Screwdriver Bits are specifically designed for use in high torque impact drivers. They are manufactured from heavy-duty, high-grade steel and have a 3 times increased life compared to standard screwdriver bits. Their precision tip geometry delivers superior fitment, reducing stripping and cam-out. The bits are Power Groove designed for compatibility with IRWIN Impact Performance Series magnetic screw-hold attachment. Specifications Suitable for high torque impact drivers Heavy-duty, high-grade steel Supplied in a moulded ABS resin case Dimensions: D 2.5 x W 18.8 x H 12.7 cm Colour: Blue What’s Included 2 x PZ1 screwdriver bits 4 x PZ2 screwdriver bits 3 x PZ3 screwdriver bits 1 x Bit holder #html-body [data-pb-style=“60FF6AAAE71BE”]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}#html-body [data-pb-style=“60FF6AAAE71CC”]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}