Sherline set contains a complete selection of 14 metric collets. Sherline WW collets, including a with dowel pin, and adapter, drawbar and a knockout bar. It is packaged in a high quality wood box constructed with finger joint corners that has a brass latch and hinges. A machined wood insert locates each part, plus a drawing in the reminds you where each part goes to keep things organized. Extra holes are provided should you want to add additional collets to suit your particular needs. This is a handsome and useful package for the serious miniature machinist.