3pc Pocket Diamond Knife Scissor Blade Hook Sharpener Set - 200 400 600 Grit Have all your favorite knives & scissors cutting like new; special groove for fishing hooks Solid steel plates have industrial diamond permanently brazed to surface during manufacture Hardest abrasive material available works with any metal, even hardened stainless steel & carbide Three sharpeners 2-1/2" x 3/4" with key chain; carry in pocket or store in tackle box Grits of 200, 400 & 600 to progressively hone blades to razor sharpness