Genuine Arkansas Hard (Fine) Slip Stone Whetstone for Sharpening Carving Tools 4 " X 1 5/8" with 1/8" and 5/16" Radius FAS-14-P Slip stone for sharpening carving gouges, molding plane blades or any concave edge Slip stone is 4 long by 1 5/8 wide, One edge is 1/8" diameter and the other is 5/16  diameter. Hard Arkansas (Fine) is used to establish and maintain a keen edge on any cutting tool Color can be Grey, White, Black/Grey, Grey/Pink, Black/ White, White or White/ Pink Genuine Arkansas stone is 100% quarried in the Ouachita Mountains of Central Arkansas