Feature●[Lift Your Foundation]: Whether age or disaster led to your sagging floors, lift them with the BISupply Basement Floor Jacks for temporary leveling support during construction renovations and repairs●[Strong Enough]: Prior to extending, secure base plate to your concrete floor slab; Weight capacity per jack up to 9,700lb (4,400kg) at all height extensions●[Adjust to Your Needs]: Our basement support columns screw jack post adjusts from 12-16in (30.48-40.64cm) tall using turning bar and screw bolt for temporary bracing●[Trusted Quality]: ISO9001 certified oxide finished steel ceiling jack post; 3in (7.62cm) diameter base post with welded-on floor plate and screw jack post; Turning bar with a large roof plate and 4 locking pins●[Home and Industrial Applications]: Not intended as permanent supports; Home leveling adjustable column jacks comes in a 2 pack so you can temporarily secure weak floors, crawl spaces, stairs, roof trussesDescription Disasters happen. Get back in your home sooner with BISupply Adjustable Basement Support Posts. Whether you are dealing with cracked floor joists, rotting support beams, or sagging decks, we are sure to have the right size floor pole jack to fit your needs. Not intended as permanent floor joist jacks, these temporary beam support posts lift you up to 36in (91.4cm) higher and can accommodate loads from 6,800-9,700lb (3,084-4,400kg) each depending on height required while repairs are made to lift your worries away. Constructed from high strength steel with an oxide finish, our basement crawlspace jacks have been ISO9001 certified to provide stability in both residential and industrial settings. Comes in a pack of 4 to stabilize any floors, trusses, beams, and more. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.