4 Pack Heavy Duty Adjustable Floor Jacks - 11.8 to 16in Telescoping

In this review the 4 Pack Heavy Duty Adjustable Floor Jacks earns a recommendation for homeowners and contractors who need sturdy, adjustable temporary supports in crawlspaces, basements, or during structural leveling. The biggest reason to buy is the combination of a telescoping 11.8 to 16in range and a per-unit rated capacity up to 11,000 lb, which makes these posts useful where compact clearance and heavy loads coincide. The set of four covers multiple joists or beam points and is simple enough for one person to install while offering durable steel construction for long term use.

Key Features

• Telescoping Height: The 11.8 to 16in adjustment range provides flexible working heights for tight crawlspaces and raised floors.
• High Capacity: Each jack is rated from about 6,600 lb up to 11,000 lb, giving substantial load support for most residential and light commercial jobs.
• Heavy-Duty Construction: Rods are made from heavy steel and the painted and galvanized surfaces resist corrosion for on-site durability.
• Compact Plates: The 5 x 5in base and 4 x 4in top plate deliver stable contact on joists and beams while fitting into constrained spaces.
• Simple Adjustment: A 12.4in adjustable lever and M22 thread lock nut make height setting and locking straightforward for one person.
• Warranty and Support: A one year warranty and customer service access provide extra reassurance after purchase.

Who It's For

This set is aimed at homeowners, handymen, and small contractors who need temporary, adjustable support posts for floor repairs, beam leveling, porch or stair work, and other tight-space applications. The compact top and base plates plus the telescoping range are particularly suited to crawlspaces where a full-size jack or shoring system won't fit.

Those needing long-term permanent columns or engineered foundation piers should look elsewhere and consult a structural engineer; these jacks are excellent for temporary support and adjustment rather than as a permanent foundation solution.

Pros & Cons

Pros

• High per-unit capacity up to 11,000 lb gives confidence for heavy loads within the rated range.
• Durable steel construction with painted and galvanized finish helps resist rust in basement and crawlspace environments.
• Simple to set and lock with the M22 nut and 12.4in lever, allowing a single person to install and adjust most placements.

Cons

• Adjusting height once the jack is under heavy load can be difficult, so pre-setting before loading is recommended.
• Top and base plate sizes are compact and may require additional blocking for very soft or irregular surfaces.

Specifications

Adjustment Range	11.8 - 16in
Height Capacity (per unit)	6,600 - 11,000 lb
Base Plate Size	5 x 5 x 0.27in
Top Plate Size	4 x 4 x 0.2in
Thread	M22
Adjustable Lever Length	12.4in

Our Verdict

The 4 Pack Heavy Duty Adjustable Floor Jacks are a practical, cost-effective option for temporary structural support and leveling tasks where space is limited and loads are substantial. For DIYers and small contractors who need reliable, adjustable posts that are easy to set up and resistant to corrosion, this kit represents good value when used as intended and pre-adjusted before loading.

Frequently Asked Questions

Can these jacks be adjusted after placing a load?
They can be adjusted, but the manufacturer notes it can be difficult under load; it is best to set the screw pole to the desired height before applying weight.

Are these meant as permanent foundation posts?
No; these are intended for temporary support, leveling, and repair work rather than as permanent engineered foundation piers.

What tools are needed for installation?
Keep the base plate still, rotate the top plate, use the swivel lever, and tighten the M22 nut with a spanner to lock the height.