CamcoAluminum Stack Jacks — Stabilize & Position Your RV, Trailer Or Camper —Supports Up to 6,000 lb — Extends 11" - 17" — Pack of 4 (44560)

I used these to store my truck camper for the winter. I used 8 Jacks and a piece of 3/4 treated plywood. Worked out great. I like that they are lightweight, stackable and don't take up a lot if room when storing in the camper. I would buy these again.

Bought a set for a new teardrop camper we purchased. Our camper has screw down stabilizers at the rear, but relies on the tongue jack for from stability. It would rock side to side some, and was hard to get exactly how we wanted it. These will rest on the frame up towards the tongue area on each side to stop the sway.Very lightweight and easy to use. Spin down the nut so that you can get the stabilizers under your unit, and then turn until they are just nice and snug. My wife will do one side while I do the other, so we get a nice, even set up. These are NOT designed to lift the camper, only hold it in place gently.Once these are installed with the rears, the camper doesn't move at all. It is very stable and a pleasure to camp in!

Fairly nice product, very light weight. Good for use as trailer stabilizer. To flimsy and light weight to use for holding up unstable weight. Would not reccomend for any critical load bearing job. They are to unstable and light weight for that. However, for trailer stabilizers or as back up support seems to work great.

Perfect for my 4000 pound 20' travel trailer!My 2014 model trailer came with two cheesy screw-down jacks at the rear. They weren't very stable, and both bent in a short amount of time. I've been using these for two years, for 35-40 nights a year, mostly one and two night stops at race tracks, and they're great. They've seen flooding rains, heat, dust, aven a little snow, and are holding up well. I looked into replacing the cheapie stock jacks with good quality scissor jacks, but they're about $100/pr, plus the effort to install. The scissor jacks don't save that much time at each stop, are heavier, and are subject to transit damage hanging from the frame.To these, I've created a kit with (4) 6" sections of 6x6 lumber, (4) 6" sections of 2x6 lumber, and (4) $1.99 hockey pucks, and a foam garden kneeler from the dollar store. I use the most blocking that will fit under each jack, and give it a few turns to snug up. Twice a year or so, I give the threads and top cap pin a spray of Boesheild or CRC 3-36, just as you would with crank down mechanisms, and they stay nice and smooth.Pucks: https://www.amazon.com/Sports-Classic-Ice-Hockey-Puck/dp/B00BPHES8W/ref=lp_3412531_1_7?s=team-sports&ie=UTF8&qid=1510232001&sr=1-7A case that nicely holds four nested jacks with the screws removed and four pucks: https://www.amazon.com/dp/B0051F8RPE/ref=twister_B00T96T7UU?_encoding=UTF8&psc=1For a larger unit, the scissors might work better, or you might need 6-8 of these, but all good at a great price for my purposes.These are NOT automotive jacks, they aren't for lifting, and I'd never crawl under a vehicle lifted off it's wheels. They are designed to remove the bounce from an r/v sitting on it's wheels and tongue jack. Please use a proper jack and jack stands for that purpose

I bought these to help me hang cabinets above my workbench in the shop. They worked incredibly well for that, with the fine adjustability of the threads helping level everything out.

We ordered a set of these to help stabilize a portable stage. When you look at them, they don't seem like they would hold a lot of weight, but I was wrong! I love them! They are so solid that I had to lower a few of them down because I accidentally lifted the stage off the ground!They weren't quite tall enough for what I needed, but I knew that before I ordered them, so I just set them on bricks or concrete blocks and they are just fine. I was actually under the stage tightening some things, and I kept bumping into them, and they didn't budge! Such a great price for such a sturdy investment!

The stands are pretty much as described but, they do not come with a second nut to use as a jam nut or any way to lock them in to position. Also the nut that they do come with does not seat squarely into the recessed receiver portion of the the base units, and this could also possibly affect the over all sturdiness especially when they are fully extended. That brings up my next point, safety. It appears that when extended, and the end of the threaded rod is flush with the collet in the base, just under the hex nut is when the over all maximum Height of 17 inches is achieved. There is no safety stop, nor maximum height indicator on the end of the threaded, so if not careful one could easily over extend the jack stand then it will become dangerously unstable. Common sense, Right?. They do seem to be good enough to get a job done and they are affordable. I would have only given them two and a half stars if I could, so I rounded to the nearest whole number and gave them a three star. The reviews have varying answers on the base dimensions. The base is obviously square, and mine measures six and one sixteenth inches on all four sides. They are simple to assemble and a breeze to operate. Most of people already know this stuff but there are some out there who don't, I hope this bit of information can be helpful. You should not try to adjust the jack stands while they are supporting a load. For safety and other obvious reasons place them, adjust them to the desired height, then gently, and carefully transfer some but not all of the weight of your load on to them. The safety warning that came with mine says, Do not use Stack Jack to support travel trailer. Stack Jack is intended to stabilize only." It says "Travel Trailer" But again, apply some common sense here especially if the load is extremely heavy and or if anyone could be in or on the supported load causing shifts in the weight.

Needed an extra point of support under our RV. They are very light, but are built strong. Took the wobble out of the RV when we are walking around inside. If I need more for anything else, I will definitely purchase these again.

It fixed the rocking of our 28 feet travel trailer without issue. Took 5 minutes to install. Should have bought that years ago.

Me gusto que es facil de usar, levante un aveo con un gato de patin para cambiar el aceite de motor pero lo sentia inseguro, ahora puse el conector de apilar facil sin herramienta y me meti super seguro debajo del aveo, como un gran mecanico, no pesa y es facil de usar,

OK

Bought to steady out my motorhome when pitched. Easy to set up, however have something to test on( flat piece of wood) if the ground is grass or soft.

Really quality for the price. Used them for the first time this weekend and it secured really well my trailer tent.