Sharp Pebble Knife Sharpening Stone Kit-Grit 1000/6000 Wet Stone-Built In Angle Guides 15/17/20/22 Degrees- Professional Whetstone Knife Sharpener Stone Set with Plastic BaseState Of The Art Design: Not all Sharpening stones are created equal. This whetstone knife sharpener stone set is designed for ultra precise sharpening. Sharpening Angle Guides can be set to 15 17 20 22 or removed, for freehand sharpening Built In Sharpening Guides: This wet stone set includes premium quality grit 1000 6000 water stones; Built In switchable angle guide with 4 angles 15 17 20 22 Degrees to accommodate a wide range of knives; non slip