The Tolsen 16518 is a professional-grade industrial socket designed for hand-operated fastening tasks. It features an 18mm size and a 1/2" square drive, constructed from heat-treated 50BV30 chrome vanadium steel to ensure durability under pressure. To maintain high precision and compatibility, it adheres to DIN3124, ISO2725-1, DIN3120, and ISO1174 standards. Its polished and chrome-plated finish protects the tool from corrosion while providing a clean look. The socket is engineered with an improved head profile that allows you to grip deformed fasteners more effectively, and a ball retaining groove keeps it securely attached to your ratchet or handle. This tool is well-suited for mechanics and technicians who need a reliable, standard-compliant socket for heavy-duty industrial or automotive work.