Universal Spacers

Just bought these and haven't used them yet to be up front. I been looking for something like this for a long time, when needed I made my own and always misplaced them.

Bought these for my son in law since I already have a set. Zack has convinced me that spacers far outweigh constantly trying to measure accurately in confined spaces. Never seen an easier way to install drawer slides & I’ve tried several methods.

A simple but wonderfully useful set of shop tools. I suspect , based on my use of these to date, that these will spend lots of time in use on my workbench.