Double-sided diamond sharpening stones for sharpening and honing chisels, router cutters, plane blades and most hand tools. Suitable for moistened or dry use. Folding handle for easy storage in toolboxes, pockets & tool-belts. Fine and medium grades. Double-sided diamond sharpening stones for sharpening and honing chisels, router cutters, plane blades and most hand tools. Suitable for moistened or dry use. Folding handle for easy storage in toolboxes, pockets & tool-belts. Fine and medium grades.