This standard contains the complete dimensional,mechanical and performance requirements forMetric Series Hexagon Keys and Bits of nominal sizesfrom 0.7 mm to 36 mm recognized as “AmericanNational Standard.” They are primarily intended tobe used for tightening and loosening metric serieshexagon socket screw products but may also be suitablefor use on other products having metric hexagonsocket wrenching provisions.1.1.2 The inclusion of dimensional data in this standardis not intended to imply that all the productsdescribed are stock production sizes. Consumers arerequested to consult with manufacturers concerninglists of stock production sizes.