Pocket Calipers

I find myself thinking about different things to make throughout the day, but I only have calipers on me when I'm at home, so I'm left to a best guess. Now, with these handy little pocket calipers, that best guess just got even better! Obviously there's no way to get these as accurate as some digital calipers, but these will allow you to get very close measurements up to 50mm (width) and 40mm (depth). There is even a screw to hold your position in case you can't write your measurement down right