Features Precision Machining: Featuring a 1-1/2-18UNF thread and 0.005mm accuracy with a 60-degree angle, this F1 Type boring head shank ensures precise milling for enhanced work quality. Effortless Setup: The compact design of the R8-1-1/2-18UNF-7/16 arbor end mill adapter enables simple and fast installation, facilitating seamless application changes. Durability: Crafted from high carbon steel, the arbor adapter offers superior hardness and wear resistance, extending the tool's lifespan for reliable, long-term use. Ergonomic Design: The end mill tool holder boasts a polished finish and ergonomic form, providing a comfortable grip that contributes to improved operational efficiency. Versatile Use: The boring tool shank excels in various tasks such as machining inner hole surfaces, boring ends, and cutting holes, making it a versatile asset for any workshop. 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