ADVANCED DESIGN - Featuring a 72-teeth ratchet mechanism, perfect for tight spots where conventional tools don't fit.9 Pieces metric wrench set and come in the sizes you'll use most often: 8, 10, 11, 12, 13, 14, 15, 17, 19mm. Wrench sizes are stamped on both sides of the handle for easier size identification.DURABLE CONSTRUCTION - Constructed with chrome vanadium steel and nickel plating, our wrenches resist corrosion and are polished to a mirror-like finish for lasting strength.Precision-machined box ends with a 180-degree flex head ensure a tight fit and easy maneuverability in confined spaces for enhanced efficiency.Widely used in vehicle maintenance, mechanical, electrical and household industries. It excels at a variety of tasks and jobs.