Feature:1. The CNC cutting edge adopts advanced CNC cutting edge grinding technology, with small error and higher cutting edge wear resistance, which greatly improves the service life of the tool.2. The drill bit is precisely made of cemented carbide, with high hardness and good heat resistance.3. Using multiple combined blade structure, unequal division of tooth pitch, not easy to collapse.4. Can be used for drilling machines, vertical table machines, milling machines, boring machines, machine tools and other processing equipment.5. With great workmanship, which can perfect replacement for the old one.Specification:Item Type: Hollow Core Drill Bit Material: CarbideUses: Used for cutting stainless steel, copper, steel, aluminum and other materials. It is suitable for various domestic magnetic drills, as well as general drilling machines, vertical table machines, milling machines, boring machines, machine tools and other processing equipment.Handle Type: Universal shankCutting Depth: Approx. 35mm / 1.4inShank Diameter: Approx. 19mm / 0.7inDiameter: Approx. 22mm / 0.9in.Package List:1 x Hollow Core Drill Bit