For the most used tap and dies I did like Grant but used a plastic box since 6 sizes covered everything I normally use. I did add a drill bit for the tap and a clearance drill bit in each compartment. Down side of the plastic box was no space for tap and die handles. I have a plug and bottom tap in each compartment. A couple have a tap I call displacement tap.. It doesn't cut but dresses up damaged threads. This has been a good subject, I have many other seldom used taps/dies threw in boxes I've long needed organized.