Item Type: Collet Chuck Holder Model: SL32-ER25-80L Material: High speed steel Purpose: Lathes and various machining centers Shank Diameter: Approx. 25mm / 1in Handle Length: Approx. 80mm / 3.1in Adapter Chuck: Approx. 32mm / 1.3in Scope of Application: CNC lathe, milling machine, drilling machine Package List 1 x Collet Chuck Holder 1Internal cooling through hole and the central through hole design, conducive to water cooling 2Antivibration and more antibending, helps for reducing the use of long knives 3Advanced vacuum quenching furnace can realize carbon and oxygen copermeation to increase the hardness of the tool shaft and enhance the lifespan 4Hex nut is convenient for clamping, loading and unloading more convenient, possess high rigidity, strong clamping force 5Can allow you to reduce the use of lengthened tools, good for reducing costs and improving efficiency 6UM type ER extension rod is tightly fitted with fine teeth. The size of ER chuck used for mounting is different, and the size of nut is also different 7Accurately ground outer diameter of the extension rod and other parts, eliminate the imbalance and increase the stability during cutting