The MILWAUKEE® 99-Piece SHOCKWAVE™ Impact Driver Bit Kit is engineered to be the most durable, best fitting driver bits on the market. The bits feature Wear Guard Tip™ for increased wear resistance which protects the fit over the life of the bit. The impact driver bits have an optimized Shockzone™ for each tip type and length of driver bit to absorb peak torque and prevent breaking. The Custom Alloy76™ Steel is customized and heat treated per tip type to extend the life of the driver but by up to 50X vs. competitive impact driver bits. The Milwaukee SHOCKWAVE™ Impact Driver bits are built to deliver users extreme durability for the most demanding applications. This 99-piece kit includes a compact bit holder in addition to Phillips, Square, Slotted, Hex, and Torx bits for maximum jobsite productivity.