■ Set of 2 Socket Adapters 1/2" 12.7mm to 1/4" 6.35mm Hex Shank Slide Lock Type for Impact Wrenches E143 Converts a 1/2 inch square female connector to a 1/4 inch hex female connector. This product is applicable to various 1/2 impact wrenches. How to Use *See image 5. 1. Pull the lock back. 2. Insert the bit all the way to the bottom. 3. Return the lock to its original position. *Be sure to securely attach the O-ring and pin to the impact wrench before use. Cannot be used with impact drivers. *No box or instruction manual included.