Polypropylenkil

Finally got my workbench perfectly level after months of fighting with folded cardboard. These shims are rigid enough to hold their position but I could trim them down with a utility knife without any cracking.

The polypropylene material feels sturdy without being brittle, and it cuts cleanly with a utility knife for custom thickness. I've used them for leveling cabinets and spacing trim, and they hold their shape under pressure without slipping. Exactly what I needed for precise adjustments around the hou

I was using these to level a workbench and the polypropylene held up way better than the wooden ones I’ve broken before—no splitting under pressure. They’re thin enough to slide into tight gaps, which saved me a lot of fiddling. Exactly what a spacer should be.