High strength, impact resistance, pressure resistance, and durability Multi-scenario Applicable]: Floor joist jack provides temporary support for leveling and stabilizing floor beams and joists during construction and repair. Jack posts can be used on stairs, porches, roof beams, decks, crawl spaces and other places where support needs to be provided 4 Pack House Jacks for Leveling Adjustable Floor Jack Post Floor Jack Their maximum load capacity is as high as 8,800 pounds / 4 tons Adjustable Floor Jack: An adjustable high-quality house jacks for leveling with an adjustment range of 11., 6 to 16., 1. Easy to install: Keep the bottom plate stationary, rotate the top plate to the desired height, and then tighten the positioning nut with a wrench to secure the top plate Heavy Duty Floor Jacks: These leveling base jacks are made of heavy-duty steel. Adjustable Floor Jack 2-Pack Adjustment Floor Jack Post Floor Jack Lift Supports Vevor Floor Jack Base plate size: 5 x 5 x 0., 19; Base plate hole diameter: 0., 5; Top Plate Size: 3 x 3 x 0., 19. Ybaymy 4-Pack Adjustable Floor Jack Post 11.6-16.1 Range Of ... Mini Screw Jack RV Step Stabilizer Telescopic For Temporary Support, Floor Jacks - Canada... Easy to Install Keep the base plate of the screw jack fixed without moving, rotate the top plate to the required height, and then tighten the locating nut with a wrench to fix the top plate Anti-rust treatment The supporting surfaces of the house floors have all been galvanized, which can effectively prevent the deterioration of the supporting rods due to rust and ensure their long-term usability.