^This.
Same deal for other manufacturers, as well. Panduit, Thomas and Betts, and AMP all sell similarly overpriced tooling for their lines of generic insulated crimp terminals. But if you need to get that UL/CSA/NRTL/NEC/ISO/DoD approval, that's what you need to be using to crimp those terminals on. The terminals only meet UL requirements when installed strictly in accordance with the manufacturer's instructions, which (naturally) call for their own tooling to be used.
Yes, you can buy a decent controlled-cycle ratcheting crimper from an aftermarket supplier for less than this POS. But then you have to hope that the inspector doesn't see it.