Description: Holds the key in place using a screw and allows the key to be turned into lock, easier for those with limited wrist function when turning. Allows key to fold into handle for easy storage and greater key keeping. Screw locks prevents it from falling out of the handle. Rounded smooth, avoids hurting hands, this key booster can store two keys, easy to open the lock. Suitable for the elderly and disabled with hand arthritis, carpal tunnel, or wrist pain. Specification: Material: PP material Color: Blue How to Use: 1. Turn the handle counterclockwise. 2. Loosen the screw. 2. Insert and secure the Key Size Chart: 12x4cm/4.72x1.57inch Package Includes: 1 Piece unlocking auxiliary key booster Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!