Crescent 70-Piece mechanics tool set contains a carefully selected assortment of Crescent brand hand tools needed for most industrial, mechanical, and consumer applications. The set includes 1/4-inch, and 3/8-inch Quick release ratcheting drives with a wide selection of standard sockets in the most common SAE and metric sizes. Included in the set are the following 3/8-inch drive tools: a 60-tooth quick-release ratchet drive, 1 extension, a 3/8-inch to 1/4-inch adapter, 14 twelve point sockets (SAE and metric). it also includes the following 1/4-inch drive tools: a 60-tooth quick-release ratchet drive, a 3-inch extension, 18 six-point sockets (SAE and metric). additionally there are 12 SAE and metric long-pattern combination wrenches a magnetic bit driver with 12 driver bits, and 8 SAE hex keys. All tools in this industrial quality tool set meet stringent new ANSI and ASME specifications and come with a full satisfaction guarantee.