Dura-Green Stones are excellent for fast contouring and finishing. Dura-Green Fine Stones are ideal for surface characterization and adjusting details. Impregnated with silicon carbide Long lasting, fast cutting and always concentric in motion Use Dura-Green Stones for: composites, amalgams, precious alloys, non-precious alloys and porcelains Use Dura-Green Fine Stones for: composites and porcelains, see Unmounted Finishing Wheelssection, for Dura-Green Wheels