The portable EdgeLogix Diamond Folding 4" Knife Sharpener 325/600 Grit (10841) features a coarse yellow side (325 grit), and a fine red side (600 grit). The interrupted sharpening surfaces allow you to speed up your sharpening by collecting the metal filings that accumulate. On each side there is a small sharpening pad that's perfect for tools, and a sharpening groove for fishhooks and pointed implements. Perfect for sharpening steel and ceramic knives, drill bits, garden tools, ice skates, ski edges, fishhooks, and more.