The Reese Towpower Elite Security Barrel Style Towing Receiver Lock includes a sleeve to convert from 1/2 in. to 5/8 in. diameter pin. The sure grip cushion grip provides for a secure, comfortable grip that won't rotate or hurt your hands. The elite security receiver lock also features a push-button lock mechanism that allows for ease of use, and the lock tumbler includes a dust cover to prevent debris and dirt from entering the key slot, keeping it clean and easy to use. Stay secure today by adding a towing receiver lock to your setup.