L.E. Wilson's bushing-type full-length sizing dies give you precise control over sizing both case neck and the rest of the case body at the same time. The use of bushings gives you the necessary control to keep the amount of neck resizing to the barest minimum needed. This reduces the risk of "overworking" your brass, extending the life of your cases. These full-length dies use the same bushings as Wilson's neck sizing dies, so you can size the case neck to provide the exact amount of tension you want on the bullet. Working up a new load with a different bullet? No problem - replace only the bushing, and you're good to go. Precision-machined, harde Mfg: L.E. Wilson, Inc.