Precise & Long-Lasting Sharpness: Keep your knives cutting like new for much longer with a rolling knife sharpener. With an easy-to-use system, achieve sharp blades in minutes. Powered by Diamonds: The sharpening disc is coated with diamond particles, one of the hardest and most effective materials for sharpening. The 400 grit surface efficiently removes the initial layer of the blade's edge while restoring sharpness. A Finer Edge: A ceramic honing disk on the opposite end of the sharpener removes burrs after sharpening. This step refines the edge for more precise cutting, improving performance across various kitchen tasks. Simple, But Effective: The rolling knife sharpening tool is simple in design yet highly functional. Select your preferred angle and use the magnetic knife holder to secure the blade. Roll the sharpening disc back and forth until the desired sharpness is achieved. Then, flip the device and use the ceramic honing disk to refine the edge.