When you’re working with difficult bolts and nuts, the URREA 70999A Hand impact driver set is a great tool to have. It includes 8 pieces that are made of S2 alloy steel for exceptional strength and durability. The bits feature a hex design, making them perfect for loosening hard to turn bolts and nuts. They come in 6 popular interchangeable 5/16‚Äù hex bits. In addition, the package includes an impact screwdriver as well as a 57 square drive 1 ¬Ω‚Äù bit. You will be able to work more efficiently with this impact driver set by your side.