The RCBS 18612 is a remarkable 3-Die Carbide Set from RCBS, designed specifically for straight-wall rifle and pistol cases. Equipped with a Carbide Sizer Die, this set not only sizes the case but also de-primes it. An additional benefit of the carbide sizer ring is its ability to eliminate the requirement for lubrication.The collection also includes an Expander Die, which broadens the case to the correct diameter to accommodate the bullet. This invaluable component also provides the case mouth with the necessary flare or bell to feed the bullet.The final piece of the set is the Seater Die. This crucial tool firmly seats the bullet and completes the process with a roll crimp.