The Milwaukee Shockwave 2 in. Impact T4 Torx Bit is engineered to be the Most Durable, Best Fitting driver bit 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.; ; Brand Name: Milwaukee Sub Brand: Shockwave Drive Type: Torx Size: T40 Length: 2 in. Product Type: Impact Power Bit Material: Steel Number in Package: 1 pc Impact Rated: Yes Shank Type: Quick-Change Hex Shank Shank Diameter: 1/4 in. Packaging Type: Carded Magnetic: No