DMT DMDS-S Dia-Sharp Magna-Disc Sharpening Kit Long lasting - more than 50 to 1 over paper abrasive discs Coarse diamond disc to quickly sharpen a neglected edge and fine diamond disc to put a keen edge on a maintained tool Faster grit change - 15 seconds versus 2 minutes for paper abrasive discs Maintain constant tool contact without fear of heat damage Works with Work Sharp models ws2000 and ws3000