Kemper Ribbon Tools - Kemper Ribbon Tools name derives from the thin flat ribbon-like steel that is used to form their cutting heads. These tools give you sharp cutting edges with additional strength in the direction of the cut. All of Kempers sculpting tools are available individually. The 8R Series is used by potters and sculptors for medium duty clay cutting, shaping, and slicing. These 8 inch Ribbon Tools have cutting ends formed from high strength sharpened stainless steel that are firmly attached to hardwood handles.