TRIMAX 5/8" Receiver Hitch Locking Pin part # T3 is used to secure the receptacle part of a trailer hitch (attached to a vehicle) to inserts such as ball mounts, drawbars, accessory carriers or ornamental receiver plugs. The T3 features a triple plated chrome finish and hardened steel and provides instant security for your camper, boat or trailer by securing your vehicle receiver hitch. Features patented 1/4 turn technology that cannot be false locked. This 5/8" pin is the correct length to fit most 2" receiver hitches (will not fit 2005+ Tacoma or 2007+ Tundra factory hitch). Trimax hitch locks feature a Type A, spring loaded, 7 pin, high security key.