Genuine Lansky Acessory for the Lansky Sharpening System. Specifically designed to sharpen inwardly curved blades such as kukris, karambits, hawkbills and scythes. This set of hones will quickly bring any inwardly curved blade from completely dull to razor sharp. Includes four stones: --Coarse 180 --Medium 280 --Fine 600 --Ultrafine 1000 USA