This knife sharpener keeps knifes sharp constantly,With excellent fine and coarse 2-stage sharpening system, you easily get a razor-sharp blade, just pull the knife from slot 1 to slot 2, each slot for 3-5 times. The non-slip cushion at its bottom offers a more stable base,avoid being hurt by accident because of sliding. Crafted from solid ABS plastic, it is strong, durable .With this product, you can recycle your old, dull knife and sharpen them back to life.