Check the listing for details. AccuSharp, Knife Sharpener, Tri Stone, 6' Ceramic Stones 025C. Condition: New. Listed at 49.99 USD. AccuSharp, Knife Sharpener, Tri Stone, 6' Ceramic Stones3 stone surfaces to choose fromEasily sharpen any straight-edge bladeAngle guide includedProduct DescriptionThe AccuSharp DELUXE Tri-Stone Knife Sharpening System features a course diamond-coated steel that allows you to easily sharpen and hone any straight-edge blade with ease. AccuSharp's three stone surfaces include coarse diamond, medium alumina-oxide, and fine ceramic. This deluxe Tri-Stone System provides extra durability and safety on any surface with a rubber-grip base which prevents sliding while sharpening and honing your knives. Additionally, the deluxe Tri-Stone Sharpener base can be mounted to most countertops for extra stability. Also included is an angle guide to assist in maintaining a consistent angle while sharpening.