Crescent 128-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 a 3/8-inch Quick release ratcheting drive 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, 2 extensions, a 3/8-inch to 1/4-inch adapter, 2 spark Plug sockets, 24 twelve point sockets (SAE and metric). additionally there are 14 SAE and metric long-pattern combination wrenches, a magnetic bit driver with 58 driver bits, and 26 SAE and metric hex keys. All tools in this industrial quality tool set meet stringent new ANSI and ASME specifications and come with a full satisfaction guarantee.