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Ergonomic quad-lobe handle design with 360° texture 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., handleexhaustive in our efforts to make the worlds safest tools, Unique in the marketplace, relevant to our customers work style, Proto helped build 1934 Fords, the Golden gate bridge and Apollo 665, made in America, making the highest quality tools Comes first, confidence that our tools will help keep them working longer and safer.