7 Machines and machine tools for treatment of materials, namely, metalworking machines and machine tools, plastic processing machines and machine tools, stone working machines and machine tools, wood working machines and tools, milling machines for the treatment of metal and milling tools being power operated metal-working machine tools; machines and machine tools for manufacturing, namely, metalworking machines and machine tools, plastic processing machines and machine tools, stone working machines and machine tools, wood working machines and machine tools; mechanical tools, namely, hand-held tools, other than hand-operated, for cutting, drilling, milling, abrading, sharpening, and for surface treatment, namely, electric drills, grinders, belt grinders, power-operated metalworking machine tools in the nature of milling tools; Grinding machines; rotary burrs; machine parts in the nature of mounted points; fine grinding tools for grinding machines; polishing tools for polishing machines; diamond-pointed metal-cutting tools and cubic boron nitride (CBN) cutting tools for use in cutting and finishing metals or other materials; power-operated grinding wheels and abrasive cut-off wheels for metalworking, plastic processing, stone working or wood working; stationary abrasive cut-off wheels for metalworking, plastic processing, stone working or wood working; technical rotary brushes being parts of machines; tool drives, in particular pneumatic drives, electric drives and flexible shaft drives, all being machines tools