Specification Brand : Respicefinem BulletPoint1 : WIDE COVERAGE OF MULTIPLE SIZES: Offers 6 different radius range options to accurately measure internal and external arcs, concave and convex surfaces from R0.3 to R100MM. BulletPoint2 : HIGH QUALITY AND MATERIAL: Made of stainless steel to ensure accuracy under long-term use. BulletPoint3 : MULTI-FUNCTIONAL APPLICATION: Suitable for complex contour size inspection in a variety of industries such as machinery manufacturing, mold processing, architectural design and so on. BulletPoint4 : LIGHTWEIGHT AND PORTABLE DESIGN: Light weight (43g~105g), easy to operate and carry on site. BulletPoint5 : EFFICIENT AND ACCURATE MEASUREMENT EXPERIENCE: One-stop solution for all kinds of radius measurement needs, improve work efficiency and ensure product quality. ItemName : Stainless Steel Arc Measuring Tool, Optional Range R0.3-100mm Internal and External Concave and Convex Radius Ruler for Machinists (R15-25MM) ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 10 centimeters ItemTypeKeyword : radius-gauges Manufacturer : Respicefinem ModelNumber : Respicefinem932kz8pdxo-04 PartNumber : Respicefinem932kz8pdxo-04 ProductDescription : Spec: Features: Made of stainless steel, the radius gauge is 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 radium gauges of different measuring range that you can choose, used to measure the radius of an object. Very useful gauge for tool & die makers, machinists, and many other worker to check the radius of tools.