With both SAE and Metric sizes, this 52 Piece Socket Set is perfect for mechanics, craftsmen, and home owners alike. This tool set offers a broad assortment of common sized sockets to fit almost any job you need to tackle. The set includes two ratchet drivers, two spark plug sockets, extensions, and a spinner handle. All of these tools are drop forged steel with a Chrome Vanadium finish for durability and protection from corrosion. The convenient carrying case opens flat for easy tool retrieval and organization on the job.