Black Nitride Expander Mandrel 21st Century

21st Century Shooting is excited to unveil a brand new product! Introducing the Slippery black Expanders, this new product will revolutionize the way you reload. Based on our proven technology, these mandrels will reduce friction and galling-they are as hard as carbide and as slick as graphite. 

21st Century Expander Mandrels and Arbors are designed for proper fit in 21st Century die bodies. While these may work in most Sinclair and PMA die bodies we cannot guarantee proper fitment in those bodies. 

These are sized .0008"  (+/-  .0002")  below bullet diameter.