6Pack Diamond Grinding Blocks for Edco, Stow and General Equipment New 6PK(Total 6 Blocks) Diamond Grinding Blocks for Edco, Stow, Husqvarna, Diamond Products and Other General Equipment Floor Grinders. Dyma-Serts grind 7 times faster than grinding stones and last longer. Perfect for grinding and prepping surfaces for staining, sealing, and tile setting applications. Can be used for wet or dry grinding. All with Wedge and ready to peg in machine.