The case which comes with the Milwaukee 28-piece hole saw kit (part #49-22-4185), while excellent for portability, is not great for finding a particular size of hole saw in a workshop. I wanted something where each size of hole saw was visible at once, and where you could remove one piece at a time and see at a glance which ones were not put back in the tool chest. So that's precisely what this hole saw organizer index solves. (Any and all trademarks are property of their respective owners.)