Round coarse file restores large and badly damaged hooks while the flat, fine diamond grit coated side hones hooks and knives to the razor-sharp edge required for large toothy gamefish. V-groove assures straight and accurate honing for the ultimate in cutting edge. Flat sides of fine surface are perfect for sharpening smaller hooks. Co-molded, ergonomic handle provides firm, yet comfortable slip-resistant grip. Coarse Round Side Fine Flat Side Non-Slip Handle Grip