Milwaukee SHOCKWAVE Impact Duty magnetic nut drivers are engineered for extreme durability and up to 30x lifespan. Made from proprietary steel and heat-treated to control hardness, the drive bits include a powerful magnet, allowing for a secure grip and unyielding bit engagement. These bits feature color-coded rings for quick and easy size identification. Broadly targeting cordless users, the SHOCKWAVE Impact Duty accessory line is ideal for heavy-duty impact applications, while also delivering a full system solution for all of your drilling and fastening needs.