Lasnten 2 Pcs 4.5x4.5 Screw Jack Post 14.5in-18.5in - Heavy Duty

In this review of the Lasnten 2 Pcs 4.5x4.5 Screw Jack Post set, the bottom line is simple: this pair of adjustable house jacks is aimed at DIY renovators and contractors who need reliable temporary support for leveling floors, shoring beams, or stabilizing basement work. The reviewer found the primary reason to buy is the combination of a compact 4.5x4.5 in footprint that fits standard 4x4 lumber and a high working load capacity, which together make it a practical and durable option for short-term structural support during repairs.

Key Features

• Package contents: Two screw shore jacks and an 11.8 in metal handle are included so work crews have the tools to adjust height on the job without sourcing extra parts.
• Fits 4.5x4.5 in lumber: The jack is shaped to accept a 4x4 wood post and hold it securely, which simplifies installation when shoring floors or beams.
• Wide adjustment range: The 14.5in to 18.5in height range gives several inches of lift to correct settling or to temporarily support structures during repairs.
• Robust base plate: The 3.5in x 6in base plate with six mounting holes offers flexible anchoring options for a stable footprint on different surfaces.
• High load capacity: Made from alloy steel with a protective black coat, each jack supports up to 24,700 lbs, which covers most temporary shoring needs in residential settings.
• Easy adjustment: The included wrench makes screw adjustments straightforward for quick setup and fine tuning on site.

Who It's For

These screw jack posts are best for homeowners tackling foundation or floor leveling projects, contractors doing short-term shoring in crawlspaces, basements, or stairwells, and farm or outbuilding repairs where a compact, high-capacity temporary support is needed. The product suits users who have experience with basic carpentry and understand how to place and secure temporary supports.

Those who should look elsewhere include anyone needing a permanent foundation solution or users who require a jacking range outside 14.5in to 18.5in; also, if you prefer a complete adjustable column system rather than a post that accepts 4x4 lumber, a different adjustable jack may be a better match.

Pros & Cons

Pros

• High working load capacity provides confidence when supporting heavy beams or flooring sections.
• Included metal handle and six-hole base plate make setup and anchoring flexible and convenient.
• Compact design fits neatly under standard 4.5x4.5 in wood pieces, saving site space during use.
• Durable alloy steel construction with coating resists corrosion for repeated jobsite use.

Cons

• The adjustment range is modest (14.5in to 18.5in), so it may not suit projects needing large lifts or fine incremental movement beyond that span.

Specifications

Package Includes	2 screw shore jacks and 1 metal handle (11.8 in)
Fits Lumber Size	Designed for 4.5x4.5 in wood pieces (4x4 lumber)
Height Range	14.5 in - 18.5 in
Base Plate Size	3.5 in x 6 in with six mounting holes
Mounting Hole Sizes	Four 0.5 in (13mm) and two 0.3 in (8mm)
Working Load Capacity	Up to 24,700 lbs (11,204 kg)
Material / Finish	Alloy steel with black paint coat

Our Verdict

The Lasnten 2 Pcs 4.5x4.5 Screw Jack Post set is a solid value for anyone needing temporary high-capacity support that pairs with 4x4 lumber. It stands out for its sturdy construction, included adjustment handle, and flexible base plate, making it practical for residential repairs and renovation projects where reliable, short-term shoring is required.

Frequently Asked Questions

Can these jacks be used in basements and crawlspaces?
Yes, they are suitable for basements, crawlspaces, stairwells and similar locations where temporary support for lumber or beams is required.

What size lumber fits the jack?
They are shaped for 4.5x4.5 in wood pieces and accept standard 4x4 lumber secured with screws.

Is the wrench included for height adjustment?
Yes, an 11.8 in metal handle is included to adjust the screw and set the desired height.