EZELAP Diamond Products 1" x 4" Diamond Stones These diamond stones are perfect for hunting and fishing knives, woodworking tools, exacto blades, axes and industrial use. No oil or water is necessary, the surface will remain true and flat. Model 31 1" x 4" Diamond Stone with groove for fishhooks   Model Description 31SF Super Fine Grit (1200) 31F Fine Grit (600) 31M Medium Grit (400) 31C Coarse Grit (250) 31XC Extra Coarse (150) Model 32 1" x 4" Diamond Stone on a Walnut Pedestal   Model Description 32F Fine Grit (600) 32M Medium Grit (400) 32C Coarse Grit (250) Model 36 1" x 4" Diamond Stone with a Leather Pouch with groove for fishhooks Model Description 36SF Super Fine Grit (1200) 36F Fine Grit (600) 36M Medium Grit (400) 36C Coarse Grit (250) 36XC Extra Coarse Grit (150)