Our beefy 1500 lb bolt-on swivel jack features a heavy-duty 8" slotted wheel to manuever more easily over rough terrain when moving trailer manually. Reinforced wheel bracket and 4-bolt mounting system provide additional strength. Once trailer is connected to ball, just crank the handle a few turns to get the wheel off the ground, pull the spring-loaded swivel pin, swing the jack up until it locks into place parallel with the trailer tongue, and you're ready to go. Zinc TUFFPLATE finish, and textured hand grip.