Feature:1. SMOOTH AND COMFORTABLE: The boring head shank has a very smooth surface, possess good appearance and comfortable grip2. QUICK RELEASE: The boring head and shank allow for quick and easy installation and removal, saving your time when switching between applications3. TECHNICAL PARAMETERS: Thread boring head shank has 0.005mm accuracy, 60 degree angle, and 11/218UNF thread4. WIDE APPLICATION: Boring head straight shank is widely used for machining inner hole surface, boring end face, cutting holes, etc.5. DURABLE HIGH CARBON STEEL: Boring head handle is made of high carbon steel for durability and long lasting performanceSpecification:Item Type: Boring Head ShankMaterial: High carbon steelThread: 1-1/2-18UNFAccuracy: 0.005mmType: Milling tool.Package List:1 x Boring Head Shank1 x Storage Box