These are great. The instructions are a piece of crap. If you just set the upper mount the correct distance from the center of the hinge and then open your door to 90 degrees. With the cylinder attached at both ends, mount the lower round plate 10mm down from the edge, and it will work fine. Remember the weight that you are lifting is not out at the lift handle, it is only a few inches ahead of your hinge point. I made the mistake of measuring the pounds of lift at only 6#, when in reality it was 45# back at the lift point.

I got these to complete a project for some tables (from I Like To Make Stuff). These helped open a really heavy MDF section (see pics). These were PERFECT. 2 of the struts did not work, as there were bent interior tabs where they connected to the hinge. I contacted the seller and they were very responsive, resolving the issue. So much so, I'm buying more of them! Just good stuff here :)

These are great! My Husband and I are working on converting a cargo trailer to a camper. We have two cabinets that have top mount doors. For over a month we struggled to keep the doors open while we were putting things in, and taking things out. Nothing worked! Finally I decided to "bite the bullet" so to speak and ordered these to try. Wow! I'm so glad I did! These came beautifully packaged with clear directions and all the necessary hardware for install. They feel hefty too, so I feel we got our money's worth. My Husband didn't have any issues installing these at all. The end result was a clean install with hinges that actually do their job! Now I no longer have to hold the doors open with my head or have to have my Husband hold the door open while I get stuff out because once we open the doors with these struts on, they stay open until we physically close them. If I was to have a single negative thing to say, it's that the directions for placement are in metric, so you have to do some configuring if you're an American and use the Imperial System. No biggie though. The conversions and easy to do and I didn't find this to be that big of an issue at all. I highly recommend these! I included a photo so you can see these in "action".

I bought these to help raise the lid of a table I was building, even using two they were not strong enough. I'm sure they would be fine on a lighter weight lid though.

I mainly bought these to put one on our chicken coop nesting box lid. It was a little heavy and cumbersome to hold open with your face while trying to harvest the eggs.

These installed in about 10 minutes and work perfectly. They work so well and I have 2 left, so I'm trying to find anywhere that I can put them!