The Calibration Mandrel to gauge thickness at an adjustable depth -- maximum 6 cm. The mandrel can be adjusted both laterally and longitudinally with respect to its supporting shaft; moreover, it can be rotated from 0 to 90 degrees, and can also be used to carry out embedding for the drip stone.
Opposing mandrels inclined at 45 degrees to order chamfers and/or beveling of varying dimensions. Whenever it is necessary to carry out rounded profile edges, these mandrels, thanks to the use of specific diamond cone-trunk grinding wheels, greatly helped the following shaping made by the oscillating mandrels by carrying out the milling of the edge.