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. 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.