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: .375, .325, .275, .225, .175, .100, .047

Millimeters: 9.53, 8.26, 6.99, 5.72, 4.45, 2.45, 1.20