Features: _x000D_Made of stainless steel, the radius gauge is durable and resistant to rust. _x000D__x000D_This radius gauge has two types of leaves so it can check both convex and concave surfaces. _x000D_Each leaf is clearly marked, convenient to identify which leaf you need. _x000D_There are radium gauges of different measuring range that you can choose, used to measure the radius of an object._x000D__x000D_Very useful gauge for tool & die makers, machinists, and many other worker to check the radius of tools. _x000D__x000D__x000D_Specification: _x000D_Measuring Range: R0.3-1.5MM, R1-6.5MM, R7-14.5MM, R15-25MM, R25-50MM, R52-100MM (Optional) _x000D_Material: Stainless steel_x000D__x000D_Weight: 43g~105g / 1.5oz~3.7oz(approx.) _x000D__x000D__x000D_Package list: _x000D_1 * Radius Gauge 1Made of stainless steel, the radius gauge is durable and resistant to rust. 2This radius gauge has two types of leaves so it can check both convex and concave surfaces. 3Each leaf is clearly marked, convenient to identify which leaf you need. 4There are radium gauges of different measuring range that you can choose, used to measure the radius of an object. 5Very useful gauge for tool & die makers, machinists, and many other worker to check the radius of tools.