Hornady Custom-Grade New Dimension Dies are the most advanced reloading dies available today. The Zip Spindle design features a series of light threads cut on the spindle and spindle collet. This design eliminates spindle slippage and takes the knuckle busting out of tightening the spindle lock while making spindle adjustments a snap. Built-in crimper gives the option of crimping without the need for an extra crimp die. Guaranteed never to break or wear out for from normal use.The intuitive design of the die allows seating and taper crimping to be completed in one step eliminating the need for a separate taper crimp die.