Features 1、Made of stainless steel, this radius gauge is durable and resistant to rust. 2、This radius gauge has two types of leaves so it can check both convex and concave surfaces. 3、Each leaf is clearly marked, convenient to identify which leaf you need. 4、There are four radium gauges in different shapes and sizes to meet you various need. 5、Very useful gauge for tool & die makers, machinists, and many other worker to check the radius of tools. Specification Features: Made of stainless steel, this radius gauge is durable and resistant to rust. This radius gauge has two types of leaves so it can check both convex and concave surfaces. Each leaf is clearly marked, convenient to identify which leaf you need. There are four radium gauges in different shapes and sizes to meet you various need. Very useful gauge for tool & die makers, machinists, and many other worker to check the radius of tools. Specification: 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 Package List