Proto J2156SImpact resistant, extruded acetate 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 and is comfortable and easy to hold, high alloy steel shanks are heat treated their entire length and black Oxide treated for added strength and durability, Made in USA.Exhaustive in our efforts to make the world?s safest tools, Unique in the marketplace, relevant to our customer?s work style, Proto helped build 1934 Fords, the Golden gate bridge and Apollo 1236, made in America, making the highest quality tools Comes first, confidence that our tools will help keep them working longer and safer.