The Master Lock no. 2866DAT features 1/2 in. (13 mm) and 5/8 in. (16 mm) swivel head; receiver locks. The receiver lock includes the push to lock; locking mechanism easily used by pushing the lock body firmly onto the pin and removing the key. The Weather Tough® seal and water tight cap provides additional protection from moisture and dirt. The limited lifetime warranty provides peace of mind from a brand you Can trust.