Feature:1. Straight-handle extension handle made of chrome-molybdenum alloy steel material with high hardness2. Suitable for deep hole processing, which can solve the need for extended depth processing3. The nuts can be tightened directly, with high rigidity and strong clamping force4. Available in four styles for choices: C10, C12, C16, C205. Suitable for ER11A chuck, which is convenient to installSpecification:Item Type: Collet Chuck HolderModel: ER11A-100LMaterial: Chrome-molybdenum alloy steelClamp Rod Diameter: 10, 12, 16, 20mmApplicable Chuck Model: ER11AHandle Length: Approx. 100mm / 3.9inOptional Style: C10, C12, C16, C20.Package List:1 x Collet Chuck Holder Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.