Features WIDELY USE: This chuck can be widely used in CNC lathes, machining centers, tapping machines, drilling machines, milling machines and other equipment. LONG SHAM: 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, dull and hardened, the 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 margin of imbalance, with high concentricity and great stability. STRONG FASTENING FORCE: The extension rod has high rigidity, strong clamping force, smooth thread, and convenient loading and unloading. Specification: Item Type:Clamping Chuck Material: Carbide Model: C20 ER11A 100L Package List: 1 x Drill Chuck 1 x key. 1 x Plastic Box Package List 1 x Collet Chuck Holder 1 x Wrench 1 x Plastic Box