Feature:1. Straight and extended shank, suitable for deep processing, which solves the need for deepening processing.2. Precision manufacturing, high reliability and stability.3. Fine workmanship, high precision. Provides high strength and durability.4. The nuts can be tightened directly, with high rigidity and strong clamping force.5. The surface is quite smooth which offers a comfortable feeling and nice appearance.Specification:Item Type: Collet Chuck Holder Model: ER20M-150LMaterial: Chrome-molybdenum alloy steelOptional Chuck Rod Diameter: 16, 20, 25mmApplicable Chuck Model: ER20MShank Length: Approx. 150mm / 5.9in.Package List:1 x Collet Chuck Holder Note:1. Due to manual measurement, there are slight errors, thank you for your understanding.2. The color of the product head is shipped randomly.3. 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.