Pro 1-2-3 Series The three-sided sharpening surface of all models offers coarse, medium and fine grits. The surface of each grit has a curve to it, allowing the rods to handle tricky blade shapes such as recurves, "S" curves, hawkbills and karambits with ease. The edges produced are flawless, gap free, razor-sharp and long lasting. The three-sided nature increases the sharpener's versatility, so you won't have to use multiple hones to give you the performance of a 1-2-3 Sharpener. 3 Different Diamond Surfaces - All in One Unit! Available in 5", 10" and 12" lengths. 100% Made in USA