4 - Slots: sharpener features four slots: ① Scissor sharpener slot for daily scissor sharpening. ② steel blade slot for grinding blunt knives. ③ rod slot for daily sharpening and preparation of knife grinding. ④ Ceramic rod slot for meticulous grinding and polishing. High Quality: knife sharpeners are constructed with a plastic body and high-quality blade slots made from ceramic, steel, and a grinding wheel, ensuring long-lasting performance. Ergonomic Design: Designed with a non-slip silicone base and ergonomic handle, this sharpener provides a secure grip for safe and effortless sharpening. The hanging design allows for convenient storage on a wall, saving space in your kitchen. Easy to Use: This knife sharpener is compact and user-friendly. Simply place the blade in the sharpening and gently pull through a few times in to restore its sharpness. Suitable for Most Knives: This sharpener is suitable for almost any type of blade and scissors, including chef knives, utility knives, slicers, paring knives, and other non-serrated blades. (Note: Not suitable for ceramic knives or serrated knives)