Astro Pnuematic 218 1/8" Pencil Type Die Grinder - 56,000rpm

Set Includes:
SA-5: Cylindrical shape 1/2" X 1" SA-3: Cylindrical shape 3/8" X 3/4" SC-3: Cylindrical radius end 3/8" X 3/4" SC-1: Cylindrical radius end 1/4" X 5/8" SD-1: Ball shape 1/4" SD-3: Ball shape 3/8" SF-3: Tree shaped radius end 3/8" X 3/4" SF-5: Tree shaped radius end 1/2" X 1" ? Should not exceed maximum 30,000rpm ? All above burrs are 1/4" shank, USA standard ? Blow molded case for easy storage and transport