[Material] Tool steel and alloy steel; Surface treatment: Electrodusting-polishing. [High quality] Adjustable hand tap made of high quality alloy steel, corrosion resistant, high hardness and durable. [Features] It can improve the efficiency of thread processing, a necessary tool for manual tapping operation, Ideal for thread processing and hand tapping in machinery manufacturing. [Elegant design] The adjustable metric thread taper adopts a non-slip design, which is easy to grip and can improve efficiency. Holds round die tables with 5 screws to fix the adjustable dies. [Easy to use] The recess of the square handle is sturdy and durable, and the jaws adjust the tap easily and firmly. Mainly used for hand tapping operations. Product Description This die helps you overcome damaged screws and threads. When a replacement bolt is hard to find, this block allows you to remove thread imperfections. Specifications: Color: Silver Size: 25*11mm. Screw Die Model: M7-M9 Surface Treatment: