I really had thought I was getting to the end of my wheel documentation. But then I went into the vault to put some away and I discovered a bunch I didn't see before. I've got tons more to show you (although some are duplicates)!
Today's offering is the Greenlee Handy Calculator. This is six inches across and in pretty good shape. The copyright date is 1952. I think this is a nice-looking wheel. I like the color scheme.
This wheel gives you much-needed information on screw and nail sizes, concrete mix recipes, characteristics of wood -- see for yourself! You can even mix your own paint using this wheel.