Groove ruler

1、Application
To precision measure angle and thickness of the tubular production's groove.
2、Bacckground
As a rule , the angle of groove is frequent measured by universal angle square; the thickness groove is frequent  measured by ordinary length  measuring tools. Groove ruler can use convenient, efficient and accurate method to solve these two problems at
the same time.

For more special measuring tools of pipe, please see the "measuring and inspection - other measuring tools and instrument - special measuring tools for pipe"