This mechanic-style set features 40 SAE and metric 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. The key and sockets are covered with a fully polished chrome finish for superior corrosion resistance. Moreover, a compact and molded storage case makes it easy to transport tools and gives them an exceptional durability. In addition to the ratchet driver, this kit includes 10 shallow SAE sockets, 7 deep SAE sockets, 10 shallow metric sockets, 7 deep metric sockets, a driver spark plug socket and a driver extension bar. This set comes with Craftsman's full lifetime warranty.