POWER OPERATED BURRING, REAMING AND ABRADING TOOLS FOR INDUSTRIAL USE-NAMELY, ABRADING DISCS, GRINDING MANDRELS, SHANK MANDRELS, POINTS AND WHEELS, PIN ROUTERS, BAND SAWS, CORE DRILLS AND PARTS THEREOF, COLLETS, GRINDERS, DRILL PRESSES, TURBINE GRINDERS AND HOLE AND AIR GRINDERS