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-150L Material: Chrome-molybdenum alloy steel Optional Chuck Rod Diameter: 16, 20, 25mm Applicable Chuck Model: ER20M Shank 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.