Over time, knives chip and dull and plates become worn down. Resurfacing both tools offers a clean, fresh surface perfect for getting excellent results with less smearing and jamming. Most importantly, working with sharp plates and knives makes manual grinders easier on the arm and puts less strain on the motors of electric grinders. Our TSM Meat Grinder Plate and Knife Sharpening System includes two ceramic sharpening stones appropriately sized for sharpening both your meat grinder knife and the grinding plates. We've used on the finest abrasives for this patent pending product and are sure that you'll be thrilled with the results. Getting started is simple! Just replace either the grinding plate or knife in your electric or manual meat grinder and using the locknut to create friction you can sharpen the corresponding piece with ease! The stones can be soaked with water for smoother operation. A few seconds of operation in an electric grinder or 10-20 cranks on a manual grinder should give good results. Severely worn down parts may require longer. It is essential to sharpen both the knife and plate at the same time in order to create a fresh surface with good contact. PATENT PENDING.