Faithfull Depth Gauge with Protractor 150mm (6in)
is no longer available although you may find similar or newer versions below:
The rule is graduated in both imperial and metric dimensions up to 150mm (6in) and a knurled thumb nut allows the rule to be locked at the chosen angle.
Blade Length: 150mm (6in).Graduations: 0.5mm or 64ths.
A versatile tool that allows the angle and depth to be measured simultaneously