EZELAP Diamond Products Special Hook & Knife Diamond Sharpeners Model H 3/4" x 2-1/2" Diamond Stone   Model Description H 3/4" x 2-1/2" Diamond Stone with a grove for fishhooks. Clip can be used to attacH to vest, belt loop or as a keychain.   Model C 3-1/2" Diamond Stone   Model Description C 3-1/2" Diamond round shaft, retracts into plastic handle with small and large grooves for fishhooks. Red, Green, Black and Orange.   Model SD 2-1/2" Diamond D Shaped Shaft with a groove for fishhooks Model Description SD Same as model S with Hook Disgorger on the end   Model ST Tapered Shaft for Sharpening Serrated Blades   Model Description ST Pocket sized sharpener with tapered shaft for serrated blades $7.99 STK Pocket sized sharpener with tapered shaft for serrated blades $10.95