Keadic 150 Pieces Nylon Round Spacer Standoffs Assortment Kit, OD 11mm and ID 6.2mm, Length 3mm 4mm 5mm 8mm 10mm 12mm 15mm 18mm 20mm 25mm for M6 Screws

Quality item! Nice size selection. Organized by size in plastic bin with separate sections. Perfect for my needs; securing a mailbox to the arm of a mailbox post. Couldn’t have been better!

I use these for many diy projects as spacers and even in place of multiple washers.These are high quality, durable, and reliable. Nice case included. Will buy again.

These little bad boys are perfect and do their job well. I can’t believe we went so long not knowing they existed. This multi length pack was the perfect way to go. I’ll be telling everyone about these.

Very good

I decided to go with this kit because I wasn't entirely sure what size of spacers I needed and other reviews mentioned how sturdy they were. I'm glad I did because I ended up needing several different sizes. My main use was to adjust some receptacles and light switches I was replacing that were previously installed improperly or sunk too far into the wall without proper spacers.I can't speak to how they would perform for heavy duty jobs but for my needs they are perfect.

I wasn't sure these would work for bringing out sunken American standard 120v outlets but they do. They are larger in diameter than I expected and very hard. You can really tighten a receptacle down on them and it doesn't have any sponginess to it once installed.

This kit is great. Electricians put outlets on and they were not flush for the cover. The kit allowed me to correct that with the various sizes!

These are just one of those things that we forget we do not need..

We used these for some knobs whose screws were too long. Worked great!

The media could not be loaded.  Makes a nice change for the box that this type of thing comes in is decent. Good selection. I'm pleased with the product and price

Good