Master Lock Swivel Head Receiver Lock has a weather tough seal and a water tight cap that protects the lock from moisture and dirt. The locking mechanism has a push to lock body that goes onto pin firmly and has a removable K1 key blank. This lock also has a 4 pin tumbler mechanism that resists picking. This lock fits both 1/2 in. & 5/8 in. receivers, the 1/2 in. pin is rated for class I/II, and 5/8 in. pin is rated for Class III/IV. This product is best used for towing automobiles, trailers, vans, moving trucks, or marine recreation.
- Swivel head receiver
- Best use: towing