A great piece of modeling equipment from the fine folks at Mission Models. Use this aluminum and steel tool to make round or conical shapes with photo-etched metal detail parts, or to create chain links or even burnish dry transfers. Precision machined and anodized for durability, the Multi-Tool is laser-marked in inches and millimeters:

Inches: .500, .350, .300, .250, .200, .125, .063

Millimeters:12.70, 8.89, 7.62, 6.35, 5.08, 3.18, 1.60