Two Size Per Wrench: 24mm, 27mm.Drop Forged Cr-V Construction: Made of heat treated chrome vanadium steel for strength and durability.Polished Finish: Mirror polished finish to resist corrosion.12-point Box End: The 12-point fits onto the fastening at twice as many angles, an advantage where swing is limited. Widely Use: Offset box end makes it easy grip the fastener where it is hard to reach.