A comprehensive YATO Professional Ratchet Socket Set, specifically identified as a 150-piece set with 1/4", 3/8", and 1/2" drive sizes. Description: Contents: This extensive tool set includes a wide array of sockets, ratchets, extensions, screwdriver bits, and other accessories, designed for various mechanical and repair tasks. Materials: The tools are primarily constructed from high-quality materials like chrome vanadium steel, with ratchets often featuring chrome molybdenum (CrM) for enhanced durability. Screwdriver bits are typically made from S2 steel.