The Milwaukee 4932472066 Shockwave Impact Duty Magnetic Bit Holder is suitable for high torque and impact applications The Milwaukee 4932472066 is a 305mm long Magnetic Bit Holder made from Custom Alloy76 Steel with a Shockzone. Features: Custom engineered steel and heat treatment for maximum strength and flexibility Optimised SHOCK ZONE absorbs up to 3X more torque for more resistance to shock from impacting Strong magnetic tip for secure grip ¼″ Hex reception (DIN 3126 - E 6.3) Very suitable for high torque and impact applications Specification: Part number: 4932472066 Length: 305mm