Radius Gauges

This is a tool that helps measure inner and outer radiuses. It comes in a nice little box with 40 gauges, ranging from 1mm to 40mm.The box has a lid that slides onto the box. Small magnets will ensure the lid stays closed. Prerequisites6 magnets sized 8x1.5mm (optional).Super glue.AssemblyThe assembly is straight-forward. Only two things:The size-tags that go on the sides of the box need to be glued on.Use 3 magnets for the lid and 3 for the box. Give them a little glue as well, so they stay put