Super 3-step system. Fast efficient and easy to use. Safe anti slip and ergonomically designed. Made of ABS durable kitchen safe plastic. Ships the same day, except Sundays. 3 Stage Knife Sharpener. Slot 1 restores worn out and damaged knives. Slot 2 refines them into original V shape. Slot 3 sharpens to a razor-blade finish. Heavy duty to last forever. Professional grade that can be used by Mom, Dad, or a chef on many different kinds of blades and kitchen knives. Simply pull the blades in each slot in one direction for a few times in the 1, 2, and 3 slot sequence and presto, difference is night and day. Great control with either right or left hand with an ergonomically designed handle and anti-slip base, allowing you to comfortably and easily renew all your knives. Crafted with high quality materials made to last. Satisfaction guaranteed.