SYSTEM 4 Metric Nut Driver Interchangeable Blade. 2.0mm. 4.7"/120mm OAL. High alloy CVM steel, hardened, corrosion protected. On 4mm hex shaft.Precision Machined Interchangeable Blades Build Custom Sets From Standard ComponentsESD Safe or Standard Molded Material HandlesWiha Exclusive CRM-72 Tool Steel BladesHardened For Maximum Life & DurabilityHard Chromed Wear Resistant FinishGuaranteed Quality - Made In GermanyWiha uses the same image for many products. Photo may not be exactly as product appears. Please read description carefully.