R8-1-1/2"-18(7/16"-20UNF) carbon steel boring bar R8 boring bar boring bar turning toolFeatures:1. The boring bar is made of thin carbon steel for durability and long service life.2. Boring bar is used in lathe with drill head.3. With accurate thread, the boring bar can connect tightly with the drill head.4. High stability and very stable during operation, reliable tool.5. Professional and practical design with beautiful appearance, easy to use. Specification:Material: Carbon Steel Upper Connections: R8Size: 1/2'' Theme: 7/16'' Type: Metric/British (Optional)Package List:1*Boring Upper 1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW. 2) Payment must be made within 3 days of placing the order. 3) If you can't checkout immediately after auction close, please wait for a few minutes and retry Payments must be completed within 3 days. About shipping 1.