Chrome vanadium steel for strength and durability Precision broached jaws for sure gripping 12-point box end for snug fit Thin walled construction for access in cramped quarters Heat treated for consistent hardness 11 Metric Combination Wrenches: 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, 19 mm Meets ANSI standards