Master Lock 2866DAT Bent Receiver Pin w/Swiveling Lock Head, Chrome PlatedPush to Lock locking mechanism push lock body onto pin firmly and remove key. Weather Tough seal and water tight cap protects lock from moisture and dirt. 4 pin tumbler mechanism resists picking. Fits both 1 2" & 5 8" receivers. Usable length of receiver pin is 3". Fits both 1 2" & 5 8" receivers Usable length of receiver pin is 3" Push to Lock locking mechanism push lock body onto pin firmly and remove key 1 2" Pin is Rated for Class I II; 3,500 lb.