The Lee Precision Carbide 3 Die Set for 40 S&W set includes powder through expanding die, bullet seating die, and a carbide full length sizing die. This 3 die set is perfect for effective and efficient re-use of your 40 Smith and Wesson ammunition. It can also be used to load the 10MM auto which makes it a versatile set. The dies have been packaged in an air-tight, low profile box that will preserve the integrity of your dies and keep them organized and at the ready.