Feature●Measure Type-The radius gauge is R19-54 for using to measure the radius of circular products.The range that can be measured is:R19,R20,R21,R22,R23,R24,R25,R26,R27,R28,R29,R30,R31,R32,R33,R34,R35,R36,R37,R38,R39,R40,R41,R42,R43,R44,R45,R46,R47,R48,R49,R50,R51,R52,R53,R54mm●Clear Scale-Every scale on this radius gauge is takes Laser Engraving. This ensures that wear will not cause the scale to be unclear or hard to read.●Stainless Steel-The 19-54mm radius gauge is made of Stainless Steel,not easy to rust and not easy to bend.Put it in a dry place and it won?t rust.●Features-Radius gauge do overheating treatment, high hardness and elasticity, long life.Small and easy to carry, it can be put directly in your pocket or pinned to your belt.●The R19-54mm radius gauge can be disassembled according to your own needs, such as choosing the size you usually use, or taking off the difficult position for separate measurement.Description