Compact and durable way to organize drill bits. Each hole is slightly larger than the bit it is intended for. For example, a 1/4" drill bit fits easily (loosely) in its hole, but not in a 15/64" hole. This also means the organizer can be used as a gauge for drill size. You can find almost the same thing on Revain, painted blue. It's a nice color and I might wish I had it, but the numbers are just white paint that will wear off over time. The case I am considering has drill size numbers stampedβ¦