Their use is like chill moulds, where it is necessary to avoid any material losses due to cutting machining or such machining inevitable need minimization only to the functional parts. They consist of two shaped matrixes between which a piece of a hot material, of necessary volume for matrix cavities filling-in plus some allowance material for addition, is being placed which is cut-off on the GRADING (trimming) TOOL in the following step. It use to be of simple design, where through a matrix, with cutting edge copying the forge circumference, this forge is pressed through downward by a pusher. After cutting-off any eventual imperfectness they are processed by barreling or are grinded by grinding tools according to the needs.