![Silicon Polishing Wheel (Knife Edge) - 220 Grit (597145681954)](http://perrinwatchparts.com/cdn/shop/files/10-01377-300_f0efe2da-9827-4e15-9c75-d126ec7b1573_300x300.jpg?v=1687416443)
7/8" Silicon Polishing Wheel (Knife Edge) - 220 Grit, box of 100 Premium silicon-carbide wheels formulated to provide the smoothest finish without the use of messy polishing compounds. This wheel is 7/8" and is grit 220 (medium). Edge is knife. Medium, soft and flexible. For smoothing surfaces and refining edges. Operating speed range is 5000 to 12,000 rpm.