Features Long Shank: The Shank of The Extension Rod Is Long, Suitable for Deep Hole Processing, And Can Be Used for Powerful Milling to Improve Efficiency. High Hardness: Forged from Carbide, Quenched And Hardened, The Collet Chuck Rod Has High Hardness, Good Strength And Toughness, Not Easy to Deform, Wear And Corrode. High Stability: The Outer Diameter And Er Inner Cone of The Extension Rod Are Finely Ground to Eliminate The Unbalance Allowance, with High Concentricity And Strong Stability. Strong Clamping Force: The Extension Rod Has High Rigidity, Strong Clamping Force, Smoothly Thread And Convenient Loading And Unloading. Wide Usage: This Collet Chuck Holder Can Be Widely Used in Cnc Lathes, Machining Centers, Tapping Machines, Drilling Machines, Milling Machines And Other Equipments. Specification: Item Type: Collet Chuck Holder Material: Carbide Model: C20 ER11A 100L Package List: 1 x Collet Chuck Holder 1 x Wrench 1 x Plastic Box Package List 1 x Collet Chuck Holder 1 x Wrench 1 x Plastic Box