Multiple Uses: Use these adjustable floor jacks to temporarily secure weak floors, crawl spaces, heavy load areas, stairs, or roof trusses. COMPACT DESIGN: This Compact, Space-Saving Jack Takes Up Minimal Storage Space But Provides Reliable Lifting For basic Tasks. To Adjust The Height Of Your Mini Screw Jack, Simply Turn The Screw To The Desired Height With A Pipe Wrench And Tighten The Set Nut Lift Supports,Adjust Supports,Level Supports,Floor Jacks,Adjustable Support Jack for The Floor,Mini Screw Jack- Post 9 to 13 VEVOR Adjustable Floor Jack Post House Floor Leveling Lift 53-93 Mini Screw Jacks For Leveling 4-PCS Lift Supports,Adjust Supports,Level Supports,Floor 9 Car Lifts For Home Garage Surface Treatment: The upper part of these foundation leveling jacks is made of galvanized finish, and the lower part is made of black oxide finish, which is strong, durable, and long-lasting, with anti-rust and anti-corrosion properties. Jack Posts & Supports ; Akron 7 Ft. 9 In. to 8 Ft. 1 In. 11,500 Lb. Capacity Steel Adjustable Mono Post. $134.99 ; Akron 7 Ft. 6 In. to 7 Ft. 10 In Basement floor joist support jacks are available. Easy To Use:These house leveling jacks are easy to install and adjust, designed to stabilize and support beams and joists during construction and repairs.