BrandArmstrongItem Dimensions LxWxH3.3 x 2.3 x 1.1 inchesMaterialStainless SteelAbout this itemMade in the USA – quality and availabilityRadius corner design engages the flats of the fastener, not the corners, providing up to 15% -20% more torque while reducing fastener rounding, enhancing the turning of worn fastenersEye-d markings optimize size visibility, also providing SAE/ metric differentiation