Ring Stick Aluminium British Standard A-Z

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

Holes are used to measure stones and extensions are used to measure mountings. Gauge has mm and carat measurements.

Carbide tipped measuring faces parallel, ground and lapped. Stainless steel spindle for rust prevention, heat resistant grips and calibration is laser etched.