Milwaukee Shockwave impact duty locking bit holders are engineered to be durable with stronger locking tip holders. The intuitive auto-locking design fits all inserts and 1/4" hex bits and the small profile Quick release collar allows for easy one handed bit tip changes. The new locking bit holders feature two magnets to maximize transfer and holding power to the fastener and prevent drops. Each bit holder features and optimized Shockwave geometry provide longer life and absorb 3 times more torque to prevent breakage.