Arkansas Sharpening Stone - Black Surgical 8"x2" 2500 Grit - Ultra Fine Traditionally used to sharpen scalpels, dental tools and straight razors Available in 2x6", 2x8", 3x8" or 3x10". Thickness: 1/2" Genuine Arkansas Sharpening Stones quarried in the Ouachita Mountains of Arkansas Made in USA, Lifetime Guarantee, Wood Box Included.