The Reese Towpower bent-pin hitch receiver lock with interchangeable pins is designed to safely secure ball mounts with either 5/8" or 1/2" receiver hole sizes. The lock features a push-button lock mechanism that makes it easy to secure. Bright chrome finish is durable and corrosion-resistant and includes a built-in rubber cap to keep out dirt. Convenient knurled knob allows easy gripping. For use on class I/II or III/IV receivers. Comes with two keys.