Features SMOOTH AND COMFORTABLE: The boring head shank has a very smooth surface, possess good appearance and comfortable grip QUICK RELEASE: The boring head and shank allow for quick and easy installation and removal, saving your time when switching between applications TECHNICAL PARAMETERS: Thread boring head shank has 0.005mm accuracy, 60 degree angle, and 1‑1/2‑18UNF thread WIDE APPLICATION: Boring head straight shank is widely used for machining inner hole surface, boring end face, cutting holes, etc. DURABLE HIGH CARBON STEEL: Boring head handle is made of high carbon steel for durability and long lasting performance 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