Review on Shinwa H101 C Metric Machinist Markings: Precision Tool for Accurate Metric Measurements by Andrew Jones

I am using a laser cutting/engraving computer application that uses metric units. I needed a reliable ruler to check my material to make sure my measurements were correct. This metric ruler ticks all the boxes. The digital scale is clearly marked and easy to read. The edge of the ruler is 0 mm, which makes it easier to measure objects from the edge. There are some useful SAE conversion charts engraved into the material on the back. I highly recommend.