3 in 1 Smart Knife Sharpener Helps Repair, Restore and Polish Blades, Fast Sharpener with double-sided with a unique angle design that makes the grinder's to be sharper and durable. Fine Grinding , has a non-slip handle It’s easy to use, no need water or electricity. Perfect for kitchen/household knives - straight or serrated, sports & pocket knives. 100% diamond abrasives in stages 1,2 and 3, sharpens the entire blade length from tip to bolster, it's easy to use, right or left handed. It's slip resistant.  Smart knife Sharpener should always be used and stored in the kitchen area.