The apparatus used to compact cement mortar prism in the three gang mould. Made in galvanized chrome steel with quick locking device for sample. Structure in two parts, fixed and oscillating. Easily removable to check weight. Drop height 15 mm with a drop 60 drops per minute cycle. Control panel with main switch, main neon. Start / Stop button with digital selector, to select number of cycles which the machine automatically stop. Supply with emergency stop switched.