LEE tells you what to use right on the flap of the box.
even they know their stuff will fall apart.... LOL
anyway i know that because....... well,,, because i just today opened a box with a new set of handles in it.
oddly,,, weirdest thing ever.
i had to take the mold back off them and turn the handles over for the mold to close properly.
if you wanna splurge on a good set of handles that cost about the same as a set of Lyman 4 cav. handles,,, look up red river rick.