Williams 1210BSC Super Combo Combination Wrench 5-16-Inch

From the Manufacturer Snap-on Industrial Brand JH Williams 5/16-Inch super combo combination wrench has a high polish chrome finish with a super torque box end. The super torque box opening design allows application of higher torque without rounding or deforming hex fastener points. No contact is made at the corners. Instead, wrenching forces are placed on the flat surfaces behind the points. May be used on all common hex, 12 point, fasteners with considerable advantage over conventional box end wrenches to increase both hand tool flexibility and economy. The box and open end openings are identical and it has a black industrial finish.