Bosch dies are ideal for cutting right-hand external threads. The hex head shape is designed for use in die stocks and adjustable wrenches. They are commonly used for threading rods, bolts, and studs. Made from heat-treated carbon steel, they are rust- and tarnish-resistant tools. The hex head shape of the die is designed for use in die stocks and adjustable wrenches; dies measure 1 in. Across the Flat. They are tooled to the most exacting specifications to ensure that threads provide a tight fit. Laser-etched marking indicates starting side, ensures size identification and won't wear off.