(Note: Avoid fastening pressure cap that not installed tool, to avoid damage the clamp spring). Use a wrench to loosen the pressure cap and took out the chuck or tool, remove the tool. Along the direction of push out the clamp spring. Then according to need replace other clamp spring. Thank you for your support.We are not responsible for undeliverable address. Dear friend, your happy is very important to me! We stand behind every product we sell. You can enjoy top-quality product and high-quality services from us, Trust me that you will have a pleasant shopping experience in here. We will be happy to assist you. We would try our best to serve you with any question / problem. The item "21pcs Precision Spring Collet Set 626mm ER40 for CNC Engraving Spindle Motor" is in sale since Saturday, June 26, 2021. This item is in the category "Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Chucks\Collet Chucks". The seller is "happys-85" and is located in China. This item can be shipped worldwide.