The Milwaukee Shockwave 8 piece 1 in. Metric Hex Impact Bit Set is engineered to have the most durable, best fitting driver bits on the market. The Wear Guard Tip delivers increased wear resistance which protects the fit over the life of the bit. The Shockzone is optimized for each tip type and length of driver bit to absorb peak torque and prevent breaking. The Custom Alloy76 has a customized steel and heat treatment per tip type to extend the life of the driver bits, providing up to 50X life vs. competitive impact driver bits. Shockwave driver bits are built to deliver extreme durability for the most demanding applications.