4 PCS House Floor Jacks Post Pole for Leveling, 11" - 16" Height Range, 4 ton Min and Max Height Capacity, Galvanized, 4 Pack

Excellent quality, Worked like a charm. will be buying more.

These jacks are light yet strong and were perfect for my application. A well designed product.

They work well, but lack a way to back off the extension once fully deployed. All I could do was to use a monkey wrench on the threaded section to lower it.

Need a wrench to tighten up,could have had a bar attached to tighten up did the job.

The actual nuts on the threads are a sloppy fit as well as waaayyy too light duty to support any type of weight. They're metric as well. I tried using a standard & metric thread nut and it won't go on. The threads are actually undercut to a 18.5 mm thread, the nuts are 19 mm. The only way to fix the solution is to use a locking nut, a nylock won't work very well.