This is the Pro-HST crimp tool for crimping heat shrink terminals and this is the tool I use personally for heat shrink terminals. The crimp band is wider and the crimp nests are narrower providing and better cold formed crimp than the typical oval nest of the FTZ tool. While both tools work well this is the tool I choose for heat shrink terminals.
NOTE: I cut the non-shrunk end off of this terminal for illustrative purposes only.