The circle segments can be used to check the radii. In combination with the lower scale, the tapered slot in the centre is used for measuring the diameter of round bars and pins. The scale on the back with 0.5 mm markings can be used to measure widths and depths. Made of flexible stainless steel with deep-etched scale.
Radius scale accurate to ±0.1 mm, diameter scale accurate to ±0.05 mm, depth scale accurate to 0.1 mm per 100 mm.