Semi-automatic instrument provided with a stainless steel surface on which two oscillating supports (knives) are positioned, moved mechanically and adjusted manually and individually, which in turn receive the specimen to be tested.
The adjustment is made with the aid of millimeter reference indexes.

The knife placed in the upper part descends by pressing on the specimen until it breaks.
This descent takes place in automatic mode, as required by the regulations and the loading speed is electronically controlled.