For Magnetic-Mount Oscillating Grinders. These diamond wheels fit the original Leonard Grind-R-Lap, and most similar low speed machines including Cold Grind, K-K Calamar, Enco, Victory, SPI, etc. Now, make your oscillating grinder sharpen faster and finer with advanced Accu-Finish Wheels! Wheels are 5″ O.D. X 3″ I.D. made on precision solid steel core.