The Starrett Radius Gages makeit easier and faster to measure radii than ever before. Made of stainless steel rust and stain resistant. The gages have five different gaging surfaces for both convex and concave radii. Each gage has precision finished radii with extra smooth, accurate edges and clearly marked with their radius. Radii or fillets can be easily check or layout more accurately with Starrett Radius Gages. Available individually and in sets. Starrett tools are made in America with the highest standards of quality and workmanship, providing fine precision tools for industrial, professional and consumer markets worldwide. Manufacturing quality tools that provide consistent and reliable performance since 1880, Starrett's commitment has earned them a reputation as one of the most trusted names in the industry. With Starrett Metrology products, the system is only a part of the whole package. From application analysis, system specification, installation, and training to post-installation field services, the excellence of our products is matched by the quality and comprehensive range of our services.