Rivet nuts comes in a wide variety of sizes and threads for practically any project.

The nuts themselves are so cheap that you could get 100 of them for about $5. But if you want an installation tool to go with the nuts, those kits appear to be $40 and up.

Do you know of a weird or unique but must-have tool that every wrencher should have? Do you want to see us put a type of tool to the test and see how it performs? Shoot me an email or drop it down in the comments!