ZONEGRACE ZG-HJ-YLW-11-16-4PK Adjustable Steel Screw Jack Posts, 4-Pack

The 11–16-inch adjustable range gives these ZONEGRACE screw jack posts a defined fit for compatible support points under floor framing and beams. The four-pack is suited to projects that need several adjustable posts.

Each jack has a maximum load capacity of 12,000 lb. A threaded steel screw lets you raise or lower the square top plate for controlled adjustment.

The yellow, rust-resistant finish stands out in crawl spaces and basements, making the posts easier to spot during installation and later checks.

Key takeaways

This set includes four adjustable house jacks, each with a maximum load capacity of 12,000 lb and an adjustable height of 11–16 inches. Use the range to match the opening at the support point, then turn the screw to bring the top plate into contact with the beam or framing. A lock nut secures the adjustment.

The stamped base has eight reinforcing ribs, and the top and bottom plates have four corner holes for project-specific fastening. These details provide useful options when setting up compatible floor joist, beam, deck, or house-leveling support. The jack is a screw-post support, not hydraulic lifting equipment.

Best use cases

Choose this set for compatible support and leveling setups in a basement, crawl space, or framing project where the measured opening falls within the 11–16-inch adjustment range. Four posts can serve projects that call for multiple support points, select their positions and fastening approach according to the structure and project requirements.

If your task calls for adjustable support rather than hydraulic lifting equipment, the threaded screw mechanism offers a direct way to raise or lower the plate and fine-tune contact. For a single repair point, a smaller pack may suit the job, this four-pack is intended for setups requiring four jacks.

Usage tips

Measure the clear opening at each planned support point before choosing the height range. Install each jack on a flat, solid bearing surface, with full, centered contact at both ends. Turn the screw to bring the top plate into position, then secure the setting with the lock nut. The plates’ corner holes allow project-specific fastening where required.

Confirm the project’s load requirements, bearing surfaces, and applicable local code before use. The 12,000 lb figure is the maximum capacity per jack, it is not a combined rating for the four-post set. Keep the posts aligned with the support they are intended to carry, and follow the requirements of the structure and installation plan.

Before you decide

How many jacks are in the set? The pack includes four adjustable house jacks. It also includes two turning bars for adjusting the screw posts.

What height can each jack adjust to? Each post adjusts from 11 to 16 inches. Measure the clear opening where it will sit to determine whether that range suits the support point.

Can these be used for hydraulic lifting? No. These are adjustable screw jack posts for compatible support and leveling setups, not hydraulic lifting equipment.

Should you buy it?

For a project that needs four adjustable support posts within an 11–16-inch range, this set combines a 12,000 lb maximum capacity per jack with a threaded adjustment, lock nut, and ribbed base. It’s a practical match for compatible beam and floor-framing support in crawl spaces, basements, and other structural leveling work.