Composite Shims and Leveling Wedges (12 Pack, 8") - Made in USA - Extreme Load Support Plastic Shims for Leveling - Table, Floor, Doors, Toilet, and Furniture Levelers

Used these while installing cabinets. Worked like a charm and would stay where I put them.

These are very good shims. Hold a lot of weight. Easily snaps with pulling up on it so you don't need to cut it. A bit pricey but much better than wood. Especially for outdoor use or in my case used to level an aquarium.

They do a pretty decent job, I do not recommend using them outside,

Love these things. So handy and useful. Used them to level my fountains and planters. Easy to use and reusable. What’s not to like?

Terrific, durable and tough

I didn't want to use wooden shims for my application since they tend to rot over time in a moisture-prone area. Feels solid and easy to tap it into place. The slope is just right so that you get precise vertical adjustments over the entire length of the shim. I ended up cutting off the ends if they were sticking out but you might be able to score it and snap them off with pliers as well. Overall it was a good fit for my job.

I needed some structural shims to level up a foundation that had a 1/2" slant to it. I like floors level and was not about to frame on what I was given. So both under the rim joists and under the floor joists I shimmed, and just finished the subfloor and it is almost perfectly level. It will make everything go better moving forward.I like that these are stiffer and feel substantial. They do not feel as if they will compress under a heavy load. They do make structural wooden shims, but these are more reasonably priced and I just like them better. Didn't use nearly as many as expected since I use a wood chisel to cut these, and all of the scraps then were used on the next joist. I ended up with very little waste, but then I'm kind of frugal anyway.Really glad I found these. It was perfect timing, and the leftovers I intend to use in hanging doors.

Worked perfect for what i used it for. Had a book shelf that was leaning forward quite a bit. These allowed me to take out the lean and not have to drill holes in the wall.