Extensions for power tools; drill bits for rotary power drills; diamond drill bits for power drilling machines, impact power drills, core drills, stationary power drilling machines; diamond drill bits being parts of machines; Diamond-pointed metal-cutting tools for Table saws, bridge saws, cutting tool mounted milling machines and cutting machines for cutting, drilling and edge grinding machines; power operated tools, namely, Drilling, cutting and grinding tools for angle grinders, electric g...