Features Enables machining of long parts: The through hole design allows for the machining of longer workpieces, providing flexibility and efficiency in CNC s. Quick setup on CNC machines: Facilitates rapid and setup on CNC machines, saving time and enhancing productivity during machining processes. Sturdy and construction: Made of high-strength hard steel material, ensuring durability and reliability for long-term use in demanding machining applications. High strength and hardness: Offers exceptional strength and hardness, providing stability and precision during machining s. High machining accuracy: Professionally manufactured to deliver high machining accuracy, ensuring and reliable performance for various CNC machining tasks. Specification: Item Type: Hex ER25 Collet Block Model: ER-25 Material: Hard Steel Color: Silver and Black Outer Diameter: 42mm/1.65in Inner Diameter: 18mm/0.72in Item Size: Approx 6.8x3.2x3.2cm / 2.68x1.26x1.26in Item Weight: Approx 347g Package Weight: Approx 364g Package Size: Approx 7.5x4.5x4.5cm / 2.95x1.77x1.77in Package List: 1 x Hex ER25 Collet Block Package List 1 x Hex ER25 Collet Block