1、ALLOY TOOL STEEL: The fast change tool holder is forged with 40Gr alloy tool steel, ensuring high hardness, good wear resistance, and long service life. 2、ADJUSTABLE HEIGHT: The height adjustment screw can adapt to various center heights of different lathe chucks, suitable for 13-18in diameter turning lathe. 3、EASY INSTALLATION: This tool post holder has compact size and standard threads, making it easy to install on engines, workbenches, or turning lathes. 4、APPLICABLE TOOLS: The V shape slot of this tool holder can accommodate 1/2‑3/4in round shank boring bars and tools, as well as 1/2‑3/4in square tool heads. 5、FINE PROCESSING: All working parts have undergone fine grinding and hardening processing, without burrs or notches, ensuring safe operation.