YASHANG Application: A very useful gauge for tool and mold manufacturers, machinists and many other workers to check the radius of tools. High-quality Materials: The radius gauge is made of stainless steel, which has higher wear resistance, corrosion resistance, durability and rust resistance. Features: The radius gauge has two types of blades, so it can check convex and concave surfaces. There is a clear mark on each leaf so that you can easily identify the leaf you need. Satisfy your Needs: There are four different shapes and sizes of radium meters to meet your various needs. Measuring Range: R0.3-1.5 / R1-6.5 / R7-14.5 / R15-25. Specification: color: silver Material: Stainless steel Measuring Range: R0.3-1.5/ R1-6.5/ R7-14.5/ R15-25 Weight: 270g / 9.5oz(approx.) Package list: 4 * Radius Gauges