Ring Stick Solid Aluminium, US Standard 1-13

Gauge will measure diameter and circumference in mm and inches.
Hollow cavity to store work tools like files, tweezers, gauges, etc.

Nickel plated steel with roller adjustment. One edge is
graduated in inches reading ½” in ½” in 1/16” divisions and other
edge in metric scale from 0 to 120mm in 1mm divisions.

10mm Capacity; Graduations 1 to 10mm.