Metric Black Finish WrightGrip Tech 6mm-24mm Provides a Superior 12 Points Anti-Slip Combination Wrench-Wright ToolsFEATURES Patented WrightGrip® technology provides unparalled tool-to-fastener contact resulting in a superior anti-slip combination wrenchForged and Machined for Best Fit and Unyielding StrengthPrecision Heat-Treated and tempered for optimal hardness, ductility and durabilityEasy to read stamp pattern in order to quickly determine opening size.Designed, engineered and manufatcured in Barberton, OH USA.Meets and exceeds ASME B107 hand tool standards.