Tackle tough fastening applications with the DEWALT TOUGHSERIES 172 pc. 3 Drive Mechanics Tool Set. This comprehensive set includes ratchets, sockets, and other versatile accessories ideal for a wide range of jobs. Featuring sockets with powerjaw technology, these tools provide 30% more torque on rounded fasteners†. The 144-tooth count ratchets deliver 4X longer life* and a 2.5 degree arc swing that helps ease movement in cramped areas. Engineered with a full-polish chrome finish that helps provide corrosion resistance, this set is packed in a durable case for organization and portability.