RCBS 3-Die Taper Crimp Set 7mm Backcountry 1215665. This set includes a Sizer Die with Decapping Unit an Expander Die for expanding and belling case mouths and a Seater Die with a crimp for precise bullet seating. Unlike carbide dies this set requires cases to be lubed prior to sizing. It comes with a durable plastic storage box and is backed by RCBS?s Lifetime Guarantee. Shellholders are sold separately. Specifications for RCBS 3-Die Taper Crimp Set: Manufacturer: RCBS Color: Stainless Features of RCBS 3-Die Taper Crimp Set: Designed specifically for 7mm Backcountry For reloadable steel alloy cases Neck sizer die resizes the case neck only Expander die expands and slightly flares the case mouth for bullet seating Taper crimp seater die seats the bullet and applies a taper crimp in one operation Neck-sized cases must be reloaded for the same rifle in which they were fired Package Contents: RCBS 3-Die Taper Crimp Set RCBS 3-Die Taper Crimp Set 7mm Backcountry 1215665