- Long-lasting sharpness: Protect your investment in quality knives with the rolling knife sharpener. It helps blades stay sharp longer, delivering extended sharpness and durability to save time and money. - Easy rolling action: Smooth rolling mechanism sharpens knives with minimal effort. The rotating grinding disc is diamond plated with natural diamond sharpening stones (D35 grit) for superior sharpening precision and durability. The diamond surface can repair damaged blades and straighten blades before sharpening. The roller grip is solid wood and freely glides on two ball bearings inside the grip. - Versatile use and compatibility: Suitable for kitchen knives, chef's knives, serrated knives, and outdoor blades. Features 15° and 20° adjustable angles to restore razor-sharp edges for all knife types, including Japanese and Western styles. - Effortless precision: Select your desired angle and secure the blade using the magnetic knife holder. Glide the sharpening disc smoothly back and forth to restore the edge with ease and accuracy. - Use scenarios: Everyday kitchen maintenance for kitchen and chef knives; outdoor use for camping, hunting, and fishing blades; sharpening serrated or bread knives.