Combination WrenchMaximum-contact box-end design provides a more secure fastener-to-wrench fit, minimizing the potential for rounding. Chamfered open-end tips allow you to get an easier lead-in on bolts and nuts. Drop-forged, tempered chrome vanadium steel ensures last-a-lifetime durability. Highly polished nickel-chrome-plated finish. Wrench Type: Combination; SAE/Metric: SAE; Opening Size(s): Assorted; Opening Type: Box/Open End.