Lansky Sharpeners Quad Sharp SharpenerClam. It features the same four angles as the Lansky Controlled-Angle System to provide an excellent portable sharpening accessory. The built-in ceramic polishing benchstone also allows the QuadSharp to be used as a fully functional stand alone sharpening solution. Specifications for Lansky Sharpeners Quad Sharp Sharpener: Manufacturer: Lansky Sharpeners Quantity: 1 Features of Lansky Sharpeners Quad Sharp Sharpener: Four sharpening angles: 17 20 25 and 30 degrees Carbide slots sharpen in 3-4 strokes Ceramic benchstone for fine polishing Rugged metal construction Fully compatible with all Lansky kits and accessories Package Contents: Lansky Sharpeners Quad Sharp Sharpener Maintain your knives in the field to the exact angle you set with your Lansky Kit. Featuring the same four angles as the Lansky Controlled Angle System 17 20 25 and 30 degree for the perfect portable sharpening accessory. The built-in ceramic polishing benchstone also allows the QuadSharp to be used as a fully functional standalone sharpening solution.