Air filters for mechanical purposes; Air screwdrivers; Grinding and polishing machines; Orbital sanding machines; Pneumatic hammers; Pneumatic hand-held drills; Pneumatic nail guns; Pneumatic ratchet wrenches; Pneumatic shears; Polishing machines for use in grinding and polishing metal, wood, ceramics and plastics; Sanding machines for woodworking; Sanding pads for power-operated sanders; Wire drawing machines