I have ordered several different sets of these two piece dies to use in my old GTD "Little Giant" die holders and you get "not" always a viable matrix set, and here's why. If you look closely at how the cutting edges are shaped or cut, you will see irregularities. Some teeth are deformed, some are crooked/ground off, and some have poor cutting edges. Nowadays I really don't understand how they can go beyond the factory? Unless it's factory seconds. Otherwise, if you get a good one, cut them like butter!