This high-speed steel T type wrench set is a must-have for anyone who needs to cut threads-on bolts and screws. Made-of high-speed steel, this metric thread cutting kit is built-to last and can be used-for a wide-range of applications. Whether you're a professional mechanic or a DIY-enthusiast, this thread cutting tool set is perfect for anyone who needs to make precise cuts on bolts and screws. From repairing engines to building machines, this thread cutting tool set can be used in a variety of automotive and-machinery applications. The handle made-of high quality bearing steel, the chuck made-of alloy-steel. Suitable for bicycle-repair, assemble furniture, machinery-manufacturing., Manufacturer: Kalttoy