The keyed-alike Lock Set adds an extra measure of security to your towing setup. It is made of high-quality, chrome-plated hardened steel with an internal O-ring and cap to seal out dirt and road grime for trouble-free use. High-quality tubular key won't bend or break. A 1/4 turn locks and unlocks the head. Rugged lock can't "pop" open or be false locked. Exceeds test specifications of 32,000 lbs.