The Fastway Simple Dual Lock Pack (86-00-3660) is the fastest and easiest way to secure your Simple ball mount and protect it from theft. The kit includes two keyed alike locking pins: a long span hitch pin for the receiver (5/8" diameter) that fits both 2" and 2.5" class III, IV, and V receivers, and one for the ball height adjustment (1/2" diameter). Each features: Hardened steel with a polished chrome finish to match the durability and looks of the Simple ball mount. Keyed alike barrel-style lock mechanism that prevents picking or drilling. Sure lock safety feature that will not release key unless the lock is fully engaged for greater towing safety and storage security. Form fitting dust caps and unique O-ring seal to keep locks clean and protected in a harsh towing environment