EZELAP Diamond Products 1" x 3" 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 21 1" x 3" x 1/4" Diamond Stone with groove for fishhooks Model Description 21SF Super Fine Grit (1200) 21F Fine Grit (600) 21M Medium Grit (400) 21C Coarse Grit (250) 21XC Extra Coarse (150) Model 22 1" x 3" Diamond Stone on a Walnut Pedestal Model Description 22F Fine Grit (600) 22M Medium Grit (400) 22C Coarse Grit (250) Model 24 1" x 3" Diamond Stone on a Walnut Paddle Model Description 24F Fine Grit (600) 24M Medium Grit (400) 24C Coarse Grit (250) Model 26 1" x 3" x 1/4" Diamond Stone with a Leather Pouch with groove for fishhooks Model Description 26SF Super Fine Grit (1200) 26F Fine Grit (600) 26M Medium Grit (400) 26C Coarse Grit (250) 26XC Extra Coarse Grit (150)