This video compares the one-pin roll crimper from Ballistic Products to the 4-pin roll crimper from The Reloader's Network. I've used BPI's roll crimper in both 12 and 20 ga for many years, however, The Reloader's Network finishes your loads just a little better.
Link for The Reloader's Network 4-pin roll crimper:
https://www.thereloadersnetwork.com/product/roll-crimper-quad-pin-20-gauge/
Link for Ballistic Products one-pin roll crimper:
https://www.ballisticproducts.com/Roll-Crimping-Tools/products/128/
Come visit Buck and Slug Reloaders on Facebook and MeWe!