Sirr0und Milwaukee 1/4X1-1/2 Nut Driver Milwaukee Shockwave Impact Duty magnetic nut drivers are engineered for extreme durability and up to 10X life. Made from proprietary steel and heat-treated to control hardness, the Shockwave Impact Duty magnetic nut drivers feature a powerful magnet allowing for a secure grip and unyielding bit engagement. The bits feature color-coded rings for quick and easy size identification and a chamferred edge to allow for fastening in tight spaces. MPN# 49-66-4512 SKU# 303035UPC# 45242324347