LM-RondoPlus comes equipped with a ceramic 400 grit sharpening stone. A finer (600 grit) and a coarser (320 grit) stone are available as spare parts.
The stone rotates in two directions. When the stone rotates away from the instrument, the sharpening effect is more delicate. For more sharpening power use a coarser stone that rotates toward the
instrument. The direction of rotation is chosen from the rocker switch.
