DeWalt Impact Ready screwdriving accessories now come in ToughCase system， the latest addition to our accessory storage line. The ToughCase system is a connectable case system designed to optimize storage space and keep your bits organized. The patented bit-bar design allows for easy bit removal and the clear lid allows you to see inside at a glance. Specifically made to handle the force from impact drivers， Impact Ready bits are made of a special steel designed to be ultra-durable. Each bit uses a black oxide process for greater wear resistance and strength. The tips can be used with impact tools rated for up to 2，000 in./lb. of torque.