RH Preyda is a manufacturer of the finest quality natural Arkansas Novaculite sharpening stones. We own the brand names of Hall Sharpening Stones, B & C Abrasives, and RH Preyda Industrial Stones. RH Preyda offers a full line of bench stones, pocket stones, sharpening kits, and hand held files. Our perspective is to supply the finest sharpening stones available. We specialize in OEM, private labeling, and custom sizes and configurations. (less)