whetstones [sharpening stones]; whetstones; stone hammers; scythe stones; grindstones [hand tools]; sharpening stones; blade sharpening instruments; sharpening tools and instruments, hand-operated; sharpening instruments; sharpening wheels [hand tools]; sharpening wheels for knives and blades; hand-operated ski edge sharpening tools; knife sharpeners; hand-operated sharpening tools and instruments; sharpening steels