Finding the right edge to sharpen your carving tools is always challenging. This carving tool slip is 9 surfaces in one stone. There are 5 concave and 4 convex surfaces for sharpening many different sizes and sweeps of carving tools. This versatile stone is available in a coarse 320 grit. This is one of the easiest tools for sharpening smaller carving tools. Stone measures 6" long by 2 1/4" wide.