Dies – engineered for cutting right-hand external threads; commonly used for threading rods, bolts, and studs Heat-treated carbon steel – provides superior durability and speed 1 In. measurement – dies measure 1 In. across the flat Rust and tarnish resistant design – provides greater durability and accuracy Laser-etched marking – indicates starting side, ensures size identification and won't wear off Precision machining – designed to ensure a tight fit ASIN B07GRS2VV6 Item Weight 0.96 ounces Manufacturer C & J Direct GmbH & Co. KG Item model number BHD12F13 Product Dimensions 0.4 x 1.78 x 5.84 inches