Jaccard Super Tendermatic Meat Tenderizer. Contains 16 knife blades. ABS side columns. 5 5/8" x 4 1/8". White ABS construction. How it works - razor sharp knife blades cut through the connective tissues that make meat tough. Tiny "heat cannels" are created without changing the shape or appearance of the meat resulting in faster penetration of marinades, even cooking throughout the meat and significantly reduced cooking times - up to 40%. Hang packaged.