1. Stainless steel forging, not easy to rust, good wear resistance, long service life. 2. The laser scale is deepened more obviously, and the surface is engraved with clear specifications for easy reading. 3. The rotating nut can be adjusted for tightness and fixed for measurement. 4. Used for measuring: welding groove Angle, external dislocation, weld reinforcement and so on.

http://olla.gr/mg-8-cam-type-stainless-steel-fillet-weld-gauge-multi-function-welding-inspection-ruler/