With this Graef Knife sharpener for Cutting machines cutting machine in top condition. Because just like ordinary kitchen knives, a cutting machine also requires regular maintenance in order to keep functioning optimally. The sharpener has a diamond grinding wheel that is durable in use and effectively makes the cutting blade razor sharp. Simply place the sharpener on the cutter of the slicer and gently move it towards the blade while the machine is running. The Graef D-1000 knife sharpener is suitable for universal use.