Features and Benefits:�Use with Milwaukee SHOCKWAVE Impact Duty™ Insert Bits�Proprietary steel and heat treat process for maximum strength and durability�Magnet holds fasteners to the drive guide�C-ring retains the insert bit�Custom alloy 76 steel maximizes resistance to wear and shock�For use with 1" insert style driver bitsMilwaukee® SHOCKWAVE™ Impact Duty™ magnetic bit holders are engineered for extreme durability and up to 30X life. Made from proprietary steel and heat treated to control hardness, the SHOCKWAVE™ Impact Duty™ magnetic bit holders feature a powerful magnet allowing for a secure grip and unyielding bit engagement. The 2-piece construction of the holders is the optimal assembly for abusive applications.