ZONEGRACE 2 Pack 11–16 Inch Adjustable Screw Jack Posts, 12,000 LB Max Load Capacity per Jack, Rust-Resistant Steel House Floor Jacks for Basement, Crawl Space, Floor Joist and Beam Support — Open-Box, 8% Off

12,000 LB MAX LOAD CAPACITY PER JACK: Each individual jack has a confirmed maximum load capacity of 12,000 lb for controlled leveling and support setup under compatible beams and floor framing. Confirm project requirements, bearing surfaces and local code before use.

CHOOSE THE CORRECT HEIGHT AND PACK: Select 7–11, 11–16 or 16–21 inch adjustable jack posts, then choose a 2 Pack for focused repair points or a 4 Pack for broader support coverage. Measure the clear opening before ordering; the ranges do not overlap at every dimension.

THREADED STEEL SCREW WITH LOCK NUT: Turn the included rod to raise or lower the square top plate, fine-tune contact, then secure the setting with the lock nut. The visible threaded screw makes controlled adjustment easier to understand than a closed mechanism.

8-RIB BASE AND FOUR-CORNER PLATES: The stamped base uses eight reinforcing ribs, while the top and bottom plates provide four corner holes for project-specific fastening. Install only on a flat, solid bearing surface and verify full, centered contact at both ends.

RUST-RESISTANT FINISH FOR SUPPORT AREAS: The yellow rust-resistant finish improves visibility in basements, crawl spaces and framing work. Use for compatible floor joist, beam, deck and house-leveling support setups; this screw jack post is not hydraulic lifting equipment.

Choose support equipment with confidence before the work begins. ZONEGRACE adjustable house floor jacks are offered in dedicated 7–11, 11–16, and 16–21 inch ranges with 2- and 4-pack options, helping you match the opening and project quantity without relying on one oversized post. Each steel screw jack post combines a threaded adjustment post, lock nut, square top plate, and an 8-rib stamped base. The set includes removable turning bar(s) as shared adjustment tools: one bar with the 2 Pack and two bars with the 4 Pack. Position each jack vertically on a flat, solid bearing surface, make the final adjustment, and tighten the lock nut with a wrench. Designed for temporary or supplemental support and fine leveling in crawl spaces, basements, floor joist and beam repair areas, decks, porches, sheds, and framing projects. Use separately rated lifting equipment whenever a structure must be raised.