Like said above, dies meant for loading revolver ammo will ship with a roll crimp die and those meant for ammo shot in a semi-auto will ship with a taper crimp die.
The Lee .45 Colt Carbide 3 die set and the 4 die .45 Colt set with a Factory Crimp die will both apply a roll crimp to the case. With the 3 die set the crimp is applied with the seating die and with the 4 die set the crimp is applies in a separate operation with that FCD.