The Craftsman 243-Piece Standard and Metric Polished Chrome Mechanics Tool Set, No. CMMT98077, comes equipped with 72-tooth ratchets, an assortment of drive tools, and a rugged three-drawer blow molded case. With a full polish chrome finish, the tools are corrosion-resistant. The 72-tooth ratchets have a minimal arc swing and come in three drive sizes: 1/4", 1/2", and 3/8". The durable case has a carrying handle and removable drawers for taking the right tools to the job. The tools also feature large markings for quick size identification and meet ASME specifications.