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

Our review of these 2 Pack Heavy Duty Adjustable Floor Jacks finds them most useful for contractors, remodelers, and handy homeowners who need reliable temporary support in tight spaces. The standout reason to buy is their heavy-duty steel rods and adjustable range, which deliver a robust 6,600 lb to 11,000 lb capacity per jack while fitting into crawlspaces and basements where a larger jack would not. Installation is straightforward for a single person, making them practical for leveling joists, supporting beams, and shoring floors during repairs.

Key Features

• Telescoping Adjustment: The 11.8 to 16in height range provides flexibility to reach and support a variety of joist and beam heights without additional extensions.
• High Load Capacity: Each jack supports between 6,600 lbs and 11,000 lbs, giving ample strength for most residential structural support tasks.
• Durable Construction: Heavy-duty steel rods with painted and galvanized surfaces resist corrosion and withstand jobsite conditions over time.
• Secure Locking: The M22 safety locking screw and screw-thread design add security once the desired height is set, reducing the risk of slip under load.
• Compact Plates: The 5 x 5in base plate and 4 x 4in top plate concentrate support where space is limited, ideal for tight crawlspaces and porch framing.
• Single-Person Setup: A 12.4in adjustable lever and simple rotation/tighten operation lets one person install and adjust the jacks quickly.

Who It's For

These jacks target homeowners doing floor leveling, contractors working in basements and crawlspaces, and anyone who needs portable, heavy-duty support without bulky equipment. Their compact footprint and high capacity make them a sensible choice for shoring up sagging floor joists, supporting temporary loads during repairs, and stabilizing deck or porch beams.

They are less suitable for automotive lifting or situations that require rapid repeated height changes under heavy dynamic load, and users who need powered or hydraulic jacks should look elsewhere. Also, plan final adjustments before loading, since fine upward adjustments under heavy load can be difficult.

Pros & Cons

Pros

• Robust load capacity per unit provides confidence for structural support tasks.
• Galvanized and painted finish improves corrosion resistance for long-term use.
• Compact base and top plates fit into tight spaces where larger supports cannot.
• Simple single-person installation reduces labor on small jobs.

Cons

• Adjusting the screw for additional upward movement once loaded can be difficult; pre-adjustment is recommended.
• The narrow top plate may require additional cribbing for very uneven bearing surfaces.

Specifications

Adjustment Range	11.8 - 16in
Height Capacity (per unit)	6,600 lbs to 11,000 lbs
Base Plate Size	5 x 5 x 0.27in
Top Plate Size	4 x 4 x 0.2in
Thread Type	M22
Adjustable Lever	12.4in
Finish	Painted and galvanized steel

Our Verdict

These adjustable floor jacks offer solid value for anyone needing reliable, heavy-duty support in confined areas. With strong steel construction, corrosion-resistant finish, and a useful adjustment range, they handle most residential structural support and leveling tasks well; just set the screw height before loading for the smoothest adjustments.

Frequently Asked Questions

Can one person install these jacks?
Yes, the design and 12.4in lever allow a single person to position and tighten each jack, though heavier loads may require care and a second person for safety.

Are these suitable for outdoor use?
The painted and galvanized finish improves corrosion resistance, but long-term outdoor exposure may still require additional protection or inspection.

What is the locking method?
Height is secured with an M22 safety locking screw that you tighten with a spanner once the top plate reaches the desired height.