This mechanic-style set features 135 SAE and metric 1/4" - 3/8" parts for all your household and automotive needs. Each socket has large markings for a quick size identification. The 72-tooth ratchet offers minimal arc swing when fastening, while the hex sockets offer increased torque with the fastener. Sockets are covered with a fully polished chrome finish for superior corrosion resistance. Furthermore, a compact and molded storage case makes it easy to transport tools and gives them an exceptional durability. In addition to ratchet drivers, this kit includes 19 shallow 1/4" sockets, a 1/4" x 3" driver extension bar, a 1/4" bit driver, 12 deep 1/4" sockets, 21 shallow 3/8" sockets and 14 deep 3/8" sockets. This set comes with Craftsman's full lifetime warranty.