Features and Benefits:•Designed for use with Milwaukee® SHOCKWAVE™ magnetic bit tip holders•Strong magnetic for secure grip•Color-coded band for easy size identification•Custom Alloy76™ steel.Milwaukee® SHOCKWAVE™ Impact Duty™ insert 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 chamfered edge to allow for fastening in tight spaces. Designed for use with Milwaukee® SHOCKWAVE™ magnetic bit tip holders 2.36 in., 3 in., 6 in., 12 in., 30° knuckle™ pivoting bit holder and all bit tip holders.