Square Shank- Spring Chuck Holder. Features: Through Hole Allows the Machining of Long Parts. Used for Quick Setup on CNC Machine Tools.. Made of Hard Tool Steel Material, Through Hardening Treatment. High Strength and Hardness. Professional Manufacturing, High Machining Accuracy. Specifications: Number of Jaws: As The Picture Shown Power: Manual Spring Collet Holder Collet Holder ER-32/ER-25 Collet Chuck ER-32/ER-25 Collet Holder ER-32/ER-25 Hex Collet Block Square Shank Chuck Holder for CNC Lathe Engraving Machine Item Type: Collet Block Color: Silver and Black Material: HardToolSteel OD: 50mm/1.97in, 50mm/1.97in,42mm/1.65in, 42mm/1.65in ID: 27mm/1.06in, 27mm/1.06in, 21mm/0.83in, 21mm/0.83in Item Size: 7x5x5cm, 7x5x5cm, 6.8x4.2x4.2cm, 6.9x4.5x4.5cm Package List: 1 X ER-32/ER-25 Collet Block . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.