Feature:1. Made of high-quality 40Cr with excellent hardness and toughness, long service life2. Specially treated surface, high hardness and good vibration resistance3. Suitable for high speed, ensuring the accuracy of hole processing4. The boring head set is main accessories for boring and CNC milling machine5. There is a storage box which you can store the tools, convenient to carrySpecification:Item Type: Boring Head SetSystem: Metric SystemMaterial: 40CrSpecifications: C20-F1-18-12PCSBoring Cutter: 12pcsBoring Head Diameter: F1 75mmMaximum Offset: 25mmThread: 1.5"-18Accuracy: 0.0005" Package List:1 x Boring Head1 x Boring Shank12 x Boring Cutter3 x Wrench