Stanley Proto FM-57.19X22 Facom Satin Obstruction Box Wrench 19 x 22 mm - 12 Point Wrench, Obstruction Box Satin 19 x 22 mm 12 Point Satin finish provides corrosion resistance and a slip resistant grip. Half-moon shape helps improve access to hidden, difficult to reach locations. 12 point box end allows for fine indexing, helping to improve speed and access. Fits 4, 6 and 12 point fasteners.