Feature:1. Internal cooling through hole and the central through hole design are conducive to water cooling2. Antivibration and more antibending, which can help for reducing the use of long knives3. Advanced vacuum quenching furnace, can realize carbon and oxygen copermeation to increase the hardness of the tool shaft and enhance the lifespan4. Hex nut, convenient for clamping, loading and unloading more convenient, possess high rigidity, strong clamping force5. Can reduce the use of lengthened tools, good for reducing costs and improving efficiency6. UM type ER extension rod is tightly fitted with fine teeth. The size of the ER chuck used for mounting is different, and the size of the nut is also different7. Accurately ground outer diameter of the extension rod and other parts to eliminate the imbalance and increase the stability during cuttingSpecification:Item Type: Collet Chuck HolderModel: SL25-ER32-80LMaterial: High speed steelPurpose: Lathes and various machining centersShank Diameter: Approx. 32mm / 1.3inHandle Length: Approx. 80mm / 3.1inAdapter Chuck: Approx. 25mm / 1inScope of Application: CNC lathe, milling machine, drilling machine.Package List:1 x Collet Chuck Holder