4 PCS Basement Floor Jack for Leveling - 18.5-34.6ft Adjustable

In this review the 4 PCS Basement Floor Jack kit is presented as a practical solution for homeowners and contractors who need temporary, adjustable support during floor, porch, or deck projects. The bottom line: these jacks shine when a durable, simple-to-adjust prop is required; each unit supports up to 4,400 lb so the set handles heavy loads while remaining straightforward to install and use. The reviewer found them especially useful for tight spaces where a compact base and a threaded top allow precise height alignment.

Key Features

• Adjustable height: The 18.5 - 34.6' adjustment range provides a wide span for common basement, joist or deck leveling tasks so fewer different props are needed on site.
• High load capacity: Each jack supports up to 4,400 lb, offering confidence when used under floor beams or heavy sections of structure during temporary support.
• Heavy-duty construction: Rods are made from thick steel and the painted, galvanized finish adds corrosion resistance for use in damp basement or outdoor environments.
• Compact footprint: A 4.9 x 4.9 in base plate and 3.9 x 3.9 in top plate allow placement in tight or crowded spaces between joists or posts.
• Simple installation: The threaded M20 mechanism lets one person rotate the top plate to the desired height and lock the locating nut with a wrench for quick setup.

Who It's For

This kit is aimed at DIYers, handymen, and small contractors who need reliable temporary support for basement floors, staircases, porches, decks, or roof beams. Its heavy load rating and compact plates suit jobs where space is limited but strength is required.

Those who need fine millimeter-scale adjustment after full installation or a reusable rapid-adjust system for frequent repositioning should consider alternative screw jacks with different locking methods, since these require disassembly to re-adjust once fully fixed in place.

Pros & Cons

Pros

• Robust build quality and welded construction give clear structural confidence on supported areas.
• Each unit carries a 4,400 lb capacity, making the set suitable for heavy-duty support tasks.
• Corrosion-resistant finish and heavy steel parts extend service life in basements and outdoor projects.

Cons

• Once installed and tightened in place the jack cannot be re-adjusted without disassembly, which limits in-place fine tuning.
• The locating nut requires a wrench for locking, so one-handed micro-adjustments are not possible.

Specifications

Adjustment range	18.5 - 34.6 in
Load capacity (per unit)	4,400 lb
Base plate size	4.9 x 4.9 x 0.24 in
Top plate size	3.9 x 3.9 x 0.2 in
Thread size	M20
Finish	Painted and galvanized steel

Our Verdict

The 4 PCS Basement Floor Jack kit is a solid, value-oriented choice for anyone needing temporary, heavy-duty support in basements, decks, or framing repairs. With sturdy steel construction, a wide 18.5 - 34.6 in range, and a 4,400 lb per-unit capacity, the set offers reliable performance and good corrosion protection; buy it if you want straightforward, strong props and do not require in-place infinite re-adjustment.

Frequently Asked Questions

Can one person install these jacks?
Yes. Installation is designed for single-person use: hold the bottom plate, rotate the top plate to the required height, and tighten the locating nut with a wrench.

Are these suitable for outdoor use?
The painted and galvanized finish provides corrosion resistance suitable for damp basement or occasional outdoor use, though long-term outdoor exposure may require inspection.

Can the jacks be re-adjusted after installation?
No. Once fixed in place the product must be disassembled and readjusted if a different height is needed.