Core drilling bits for metalworking; core drilling bits for woodworking; core drilling bits for concrete working; core drilling bits for mortar working; core drilling bits for tile working; core drilling bits for drilling synthetic resins; core drilling bits for drilling fiber-reinforced plastic; core drilling bits; machine tools, namely, drill bits for rock drilling, bits for power drills; drill bits for power-operated metalworking machines; drill bits for power drills for drilling concrete;...