The MILWAUKEE SHOCKWAVE Impact Duty Magnetic Nut Drivers are designed to withstand heavy-duty applications throughout their lifespan. These nut drivers are equipped with a highly durable magnet that securely holds screws during application set-up, ensuring a strong and unyielding bit engagement. Made from heat-treated CUSTOM ALLOY76 steel, these nut drivers offer extended bit life by controlling hardness. The optimized SHOCK ZONE absorbs peak torque, preventing bit breakage and ensuring long-lasting performance. Additionally, the chamfered edge of these nut drivers maximizes screw-head engagement, while the improved hex geometry provides the best fit and reduces stripping during use. The nut drivers also feature color-coded bands that aid in selecting the right diameter. These nut drivers are specifically designed for use with impact drivers and drill drivers, making them suitable for heavy-duty impact applications. The package includes nut drivers in sizes 1/4 in., 5/16 in., 3/8 in., and 7/16 in. With their superior features and high-quality construction, these MILWAUKEE SHOCKWAVE Impact Duty Magnetic Nut Drivers are a reliable choice for professionals and DIY enthusiasts alike.