4 pc SET size #12 meat grinder plates and knife. These are stainless steel parts that will not rust. In this set you receive teh 1/4" hole for burgers, 1/2" holes for sausage grind and the 3/4" holes for chili grind. The size #12 plate measures 2 3/4" diameter so PLEASE MEASURE to make sure that you have a standard size #12 meat grinder.