Feature:1. 40CR ALLOY STEEL: The chuck tool handle is made of 40Cr alloy steel material, with high hardness, good wear resistance and stable performance.2. HIGH HARDNESS: Vacuum quenching treatment can realize carbon oxygen co infiltration, improve the hardness, and can withstand a certain impact and load.3. HIGH ACCURACY: The shank is fully ground as a whole, with high centering accuracy, and effectively protects the connection of the taper hole of the power head.4. PRESSURE DISPERSION: Good rigidity, the pressure is dispersed on the precise needle rollers of the cage during use, suitable for large cutting amount machining.5. FOR CNC DEVICES: The tool holder has high accuracy and is widely used in CNC machining center and engraving machine, etc., convenient and durable.Specification:Item Type: Chuck Tool HolderMaterial: 40Cr Alloy SteelModel: NT30 ER32Drawbar Thread: M12Tail Aperture: Approx. 12mm or 0.5inStructure Type: IntegralAccuracy: 0.003Scope of Application: CNC machining center, engraving machine and other high speed machines.Package List:1 x Tool Holder1 x ER32 Wrench