Durability RUST RESISTANT BUILD: Constructed from alloy steel with anticorrosion surfaces to withstand harsh automotive repair environments, ensuring long term in oily or humid conditions ANTISLIP HANDLE DESIGN: Ergonomically designed with knurled antislip handle for stable grip and even force distribution, reducing hand fatigue during prolonged use while remaining beginner friendly Precisely RESTORATION: The heat treated 65Mn alloy dies achieve HRC60 hardness for sharpness, wear resistant edges that efficiently remove rust and burrs while restoring threads to standard without chipping ADJUSTABLE CLAMPING SYSTEMS: Features an adjustable jaw mechanism that securely fits various shaft diameters, eliminating the need for tool changes during different threading repair tasks MULTISIZE ADAPTABILITY: Designed for shafts with diameters ranging 35-130mm ( 1-1 / 4 " to 5 "), this thread restorer comes with 6 multisize dies, each featuring 4thread specifications to cover metric and imperials pitches for versatile repairs on drive shafts and axles, Manufacturer: APGLSXY