Description: Material:The professional knife sharpening is crafted fromsteel material , its strong,sturdy and designed to last a lifetime.Four Fixed Angles:Knife sharpener kits with 15, 20, 18, 22 degree sharpening, Easy To UseRoller knife sharpening is easy to use,choose a suitable angle, then, place the knife on the sharpener and use appropriate force to roll the sharpener.Design: Household sharpeningis practical and efficient knife sharpening tool for any kitchen where you need to keep your knives sharpOccasion Application:Rolling knife sharpening system for kitchen,chef knives. Size Chart: 8.4cmx5.5cm/3.31inchx2.17inch Package Includes: 1 Rolling Knife Sharpener Note: Please allow slightly errors due to manual measurement and different monitors.