Includes 10 high speed steel bits in the following metric sizes: 0.7mm(.0275”), 0.8(.0315”), 0.9(.0354”), 1.0(.0393”), 1.2(.0472”), 1.4(.0551”), 1.6(.063”), 1.8(.071”), 2.0(.0787”), 2.2 mm (.0866”), plus sturdy storage box. Maximum rpm: 18,000.