Features [Precise Boring] The boring head shank with a precise of ≤0.005mm and 60 degree angle ensures accurate and smoothly working. [Threaded Design] The threaded design of this shank allows for easy and quick installation and disassembly between boring head and shank, saving time. [Standard Thread] The 1 1/2 18UNF thread enables compatibility with various boring heads, standard and precise, easy to install and secure to connect. [Reliable Material] Made of high carbon steel, this boring head shank offers excellent strength and longevity, with smoothly surface and comfortable grip. [Wide Usage] This boring tool shank can be widely used for machining inner hole surfaces, boring end faces, cutting holes, etc., practical and versatile. Specification:Item Type: Boring Head Shank Material: High Carbon Steel Thread: 1 1/2 18UNF Accuracy: ≤0.005mm Type: Milling Tool Package List:1 x Boring Head Shank1 x Storage Box Package List 1 x Boring Head Shank 1 x Storage Box