Libra New 5000 lb 30" RV Trailer Stabilizer Leveling Scissor Jack w/handle and socket - 26021 Stablizing and leveling your RV/Trailer, Remains steady on soft surfaces because of wide bow-tie base Includes 1 steel jack, 1 manual crank handle and 1 magnetic socket for power drill cranking, 4 pc mounting screw hardware Capacity: 5,000 lbs per jack (Min. breaking strengh), Bolts or welds on Extended height: 30", Retracted height: 5" For RV stablizing and leveling purpose only, Never use for lifting, changing tires or supporting weight of any vehicles,