Proto® Duratek™ Nut Drivers Features and benefits Specifications Features and benefits Ergonomic quad-lobe handle design with 360° texture grip for additional grip.Designed to meet demanding heavy-duty needs of industrial maintenance and assembly applications.Screwdrivers meet ASME B107.15 standards.Made in USA. HANDLEImpact and chemical resistance handles are four-sided with broad but shallow flutes.Resistant to most harsh chemicals (including hydraulic fluids used in the aerospace industry).Four-sided handle design helps prevent "roll away" from the work surface. Specifications Unit of Measure Fractional Specification ASME ASME B107.12 Shank Type Round Print Warranty Share Literature