Stanley Proto J1065M 12 Point Metric Offset Box Wrench 17 X 19mm Full polish finish provides corrosion resistance and easy to clean surfaces. 12 point box end allows for fine indexing, helping to improve speed and access. Fits 4, 6 and 12 point fasteners. Box ends incorporate the TorquePlus system. Offset box end allows access to recessed fasteners and keeps hands clear of obstructions. Ideal for use on stubborn or damaged fasteners.