Includes sizes 8MM, 9MM, 10MM, 11MM, 12MM, 13MM, 14MM, 15MM, 16MM, 17MM, 18MM, 19MM, 20MM, 21MM and 22MM. Long pattern provides access to hard to reach fasteners as well as additional leverage. Open end provides stronger grip on fasteners, reduces fastener rounding and delivers up to 25% more torque. Offset box end. Size stamped on both sides and head of wrench. Packaged in plastic storage tray.