Feature:1. [Professional Rolling Sharpener] This upgraded sharpener features a rolling design that enhances cutting performance, allowing your blades to maintain sharpness for extended periods.2. [Premium Materials] The roller and magnetic base are crafted from natural wood, the roller is equipped with 400 and 1000 grit diamond discs. Sharpen with 400 grit diamond disc and polish with 1000 grit diamond disc.3. [Versatile Magnetic Angle Base] The sharpener includes two angle options, 20 for most household kitchen cutters and 15 for sharper edges or super fine cutting requirements, catering to diverse sharpening needs (excluding serrated and scissors).4. [Wide Usage] Ideal for fine cutting tasks such as sushi, sashimi, particularly those made from high carbon hard steel, offering professional sharpness for various blade types.5. [Easy Sharpening Process] Select the desired angle, secure the blade with the magnetic holder, then roll the blade back and forth until sharply. Finally, polish the edge with the smoother disc on the other end.Specification:Item Type: Rolling SharpenerMaterial: Diamond, Aluminum Alloy, Beech Wood2 Angle Options: 20 for most household kitchens, 15 for higher sharpness requirements or super fine cutting, meeting your different needs.Package List:1 x Rolling Sharpener1 x Multi Functional Magnetic Angle Base1 x Instruction Manual