AccuPro 775638 CAT40 0.02" x 0.433" Taper Shank ER16 Collet Chuck. Thank you for your interest in this item. We do our best to accurately describe each item as best as possible. If you have any questions or require any additional information, send us a message and we will happily assist you in a timely manner.We are happy to offer these services. All of our products are brand-new and unused, unless otherwise clearly stated. Packaging for our products has been opened for picture-taking and inspecting only. Products may or may not be in original packaging. Our mission is to please all of our customers. Please let us know if you have any questions or concerns. We are happy to help.