The Work SharpA(R) Rolling Knife Sharpener packs all their modern blade maintenance knowledge into a compact handheld no-electricity-required manual knife sharpener. Magnetic angle block holds your blade securely at one of 4 different pre-set sharpening angles. 3 levels of abrasives build your edge back up to a razor-sharp finish. Safe and ergonomic rolling action Magnetic angle block with (4) sharpening angles: 15Adeg, 17Adeg, 20Adeg, 25Adeg Sharpens folders, pocket knives, and kitchen knivesIncluded abrasives: Coarse 320 grit diamond Fine 600 grit diamond Fine ceramic