Borers; borers; boring tools [hand-operated tools]; diamond drill bits for hand-operated tools; diamond cutting tools for hand-operated tools; tile cutters [hand operated tools]; grindstones [hand tools]; abrasive discs [parts for hand operated tools]; hand-operated tools for drilling; rotary dies [hand-operated tools]; rotary tool bits [hand-operated tools]; impact drills [hand-operated tools]; grindstones [hand tools]; abrasive discs [parts for hand operated tools]; cutters [hand operated t...