1. High-quality materials: Our ER40 Spring Collect Chuck Clamp is made from materials that long-lasting performance and reliability. The clamp is designed to securely hold 3mm pring collets, providing a strong grip for your CNC engraving machine chuck. 2. Precise and accurate: With an accuracy of 0.02mm, our ER40 Spring Collect Chuck Clamp ensures precise and accurate machining. This level of precision allows for intricate engraving and consistent results, making it a perfect choice for professionals and DIY enthusiasts alike. 3. Versatile compatibility: Designed for use with CNC engraving machines, our ER40 Spring Collect Chuck Clamp is compatible with a wide range of chucks. Whether you're working on wood, metal, or other materials, this versatile clamp can handle it all. 4. Easy to use: Our ER40 Spring Collect Chuck Clamp features a user-friendly design that makes it quick and easy to install and remove collets. The secure clamp mechanism ensures that the collets stay in place during operation, providing stability and reducing errors. 5. Reliable performance: Backed by years of experience as a trusted seller, our ER40 Spring Collect Chuck Clamp has been tested and proven to deliver reliable performance. Invest in this high-quality tool and experience smooth and efficient machining for all your engraving needs. Colour:As Shown Material:steel Package Contents: 1X ER40 Spring Collet Chuck Clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.