Wanted to put in a good word for this outstanding product. IMHO it is the best priming tool available. It has a very positive click adustment for seating depth, the shellplate can be easily oriented as you want, and it is dirt simple and fast to change out shellholders. In addition, it has a nice hefty feel in your hands. My Sinclair was a nice unit, but much more complicated and time-consuming to do swaps and adjustments. Also, the 21st Century adjustments stay in place. This is a better mouse-trap.