7 Machines and machine tools for the cutting and forming of materials, milling machines, power drill bits and tool bits for machines, extension bars for power tools; metal working machines, namely, saws and cutters; milling cutters for machine tools; special tools, namely, power drills with holes in the bit for cooling; lathes, engraving machines; power-operated saws; power tools, namely, scroll saws, band saws, chain saws, and circular saws, all the aforesaid being machines; machine parts in the nature of blades for machines; threading machines, thread milling cutters for machines, electrical drills for machines, boring machines; replacements parts for boring machines, namely, reamers; replacement parts for excavating machines, namely, chisels, centrifugal grinding machines, grinding machines for metalworking, grinding machines for the treatment of ceramics and metal, grinding machines with spiral bevel gears, internal grinding machines, involute grinding machines; polishing machines for use in grinding and polishing metal, wood, ceramics and plastics; rotary grinding machines, screw grinding machines, tool grinding machines, vibratory grinding machines, wood grinding machines, wheels being parts of machines; abrasive disks for power-operated grinding machines for cutting and burring metals and building materials; stands for machines in the nature of stands for power-operated saws; replacement parts for drilling machines, namely, drilling heads; drilling machines; replacement parts for milling machines, namely, milling cutters; replacement parts for cutting machines, namely, knives and blade holders; stands for machines, power drills; gears for industrial machinery, namely, ring gears for drilling machines; cutting machines; power drill replacement parts, namely, drilling heads and chucks; saws being parts of reciprocating saw machines