BISupply Adjustable Post Jack Screw Temporary Shore Jack 4x4 Shoring Jack Post, Lumber Beam Jack Post Joist Support Jack

screw is hard to turn but turning the screws before use loosens them up very sturdy used them to support garage roof.

Our backyard deck had a noticeable sag in the middle and we used this jack to add a post and additional support. It corrected the sag and now the deck looks great. Easy to use and durable. Price point was very reasonable. Would recommend!

I bought this to jack-up and hold up a corner of my outdoor pergola so that I could replace a rotting post on that corner. But my plan to do so with this post-holder didn't work as the "screw" on this post-jack that I expected to turn to raise my temporary post just doesn't turn. Like others have said, the threading just doesn't work and nothing turns without massive effort, and then just gets stuck. I'd return this unit but I waited for cold and snow to go away before I tried it, and by then a little too much time had gone by and I missed the Amazon return window.

I ordered these for a foundation repair project I'm doing, I was going to get the Ellis ones but they're twice the cost and still are just manufactured in china, so I went with these since they're cheaper. When they came I put some Vaseline on the threads and completely unscrewed them so they would be easy to turn. The section of sill plate I'm holding with these is 9' above the dirt, I'm using 2 2x4s with 3/4 scrap ply in between which is way cheaper than buying 4x4 posts.

I had a pole barn with a rotting pole that I needed to fix, and these helped quite a bit. I got some 4x4x10' and used it to support the barn while I dug the old pole out, poured a footing and replaced it. These things worked, but there are 2 important things to understand: 1. These are not jacks. You cannot lift with them. You brace with them. I had a loader on a tractor and a chain, which I lifted the bad post with and then put these braces in. Had I not used a loader, I would have had to use a car jack or something to lift the barn, then put these braces in. I'll say it one more time - you cannot lift with these things - you jack up what you want to brace (with something else) then put these under it and raise them until snug and then remove the jack. 2. As with many things in life, if you lube them they will be a lot easier to screw. If you don't lube them, screwing them will be an exercise in frustration, causing the shafts that you use to screw them to bend and making it almost impossible to put where you want them. I would strongly recommend getting some axle/bearing grease when you get these. Then, remove the base plate and screw completely from the 4x4 receiver. I put on a rubber glove and put axle grease along the shaft and threads of the screw and then screwed the screw in. Wipe off the excess, and these things will last forever. If you don't do this, they will not screw properly and the bars will warp, threads will grind and strip and they won't last long at all.