Leveling Jack; Use To Level RV While Parked On Uneven Terrain/ For Changing Tires On Dual-Axle Trailers; 20000 Pound Capacity; 24 Inch Length x 6-1/8 Inch Width x 6 Inch Height; Aluminum The EZ Jack is an easy-to-use, reliable device that functions as a jack for changing tires on dual-axle trailers. It also serves a wheel chock or a level. Keeping in mind the high quality and unique functional designs found in our coupler locks, we created a line of trailer accessories. Our most successful accessory in our line Whether being used as a full load jack (not pneumatic - no moving parts) or as a chock, this item will become an invaluable tool to change a tire. Recommended Use: RV While Parked On Uneven Terrain/ For Changing Tires On Dual-Axle Trailers Operation Type: Manual Weight Capacity: 20000 Pound Material: Aluminum With Motor: No With Crank Handle: No Estimated Install Time (Hours): 1