Proto - Black Oxide Combination Wrench 5/16" - 12 Pt. (J1210BA)

Anti-slip design (ASD) open end, fractional sizes 11/32" And smaller and sizes 1-5/16" And larger do not have the ASD feature. > box ends incorporate the TorquePlus system, Box end is countersunk for easy application to the fastener, exhaustive in our efforts to make the worlds safest tools, Unique in the marketplace, relevant to our customers work style, Proto helped build 1934 Fords, the Golden gate bridge and Apollo 715, made in America, making the highest quality tools Comes first, confidence that our tools will help keep them working longer and safer.