Used with 3/8 square ratchet wrench/torque wrench, widely used in automobile maintenance, mechanical maintenance, industrial manufacturing, construction sites and other occasions。 Features: Made from fine quality chromium molybdenum steel material, has superior hardness and high durability. Visible size markings for easy visibility, which can save your time. Useful tool kit for automobile repairing and maintenance. A set of ten specifications, more widely used. Universal 3/8in square drive. With a box for easy storage and carrying. Specifications: Main color: black Material: chromium molybdenum steel Socket size: 48 * 17mm / 1.9 * 0.7in Socket specifications: M4, M5, M6, M7, M8, M9, M10, M12, M14, M16 Square drive: 3/8in (10mm) Package size: 190 * 130 * 40mm / 7.5 * 5.1 * 1.6in Package weight: 600g / 1.3lb Packing List: 10 * Socket 1 * Storage Box