1[Precise Boring] The boring head shank with a precise of 0.005mm and 60 degree angle ensures accurate and smoothly working. 2[Threaded Design] The threaded design of this shank allows for easy and quick installation and disassembly between boring head and shank, saving time. 3[Standard Thread] The 1 1/2 18UNF thread enables compatibility with various boring heads, standard and precise, easy to install and secure to connect. 4[Reliable Material] Made of high carbon steel, this boring head shank offers excellent strength and longevity, with smoothly surface and comfortable grip. 5[Wide Usage] This boring tool shank can be widely used for machining inner hole surfaces, boring end faces, cutting holes, etc., practical and versatile. 1 x Boring Head Shank 1 x Storage Box