Graduation in mm
Reading +/- 0.1 mm
Reverse side : Conversion Table inches to mm.
Bottom edge : 1/16ths, 1/32nds, 1/64ths.
Used to Check Straightness or flatness of surfaces
This Is Made Of Tool Steel With Hard Chrome Plating
To find the centre just find the identical measurement from
The rules have dual scale-normal graduation on the top edge