Well, the first set of crimpers I owned were for uninsulated terminals. Then I learned of the insulated terminal variety.
Work had a Berg connector crimper:
https://store.crimptools.com/54-berg-dupont-crimp-tools- or similar. Any production tool, should be the EXACT match.
I think a lot of tools tend to "strangle" or them at the neck because they are not fully supported.
I've done pretty good with most terminals with an AMP non-racheting crimper. I ended up making AMP CPC tools my de-facto standard because the pins inserted and removed like butter. I intended re-usability, but it never happened. They systems didn't get dismantled in my lifetime there.
Aside:
I made stuff that was still there 30 years later. e.g. A modular box for a temperature controller. The temperature controller was long discontinued, but the box lived on using the old temperature controllers. Someone re-pourposed the same box, to use a much smaller, cheaper controller.
The controllers consisted of a temperature controller and a proprietary SCR unit that connected with 4 wires. The controller had for be ordered for the specified thermoucouple. So, to start off, there was a miniature TC connector housing that would accept any miniature connector and a grommet that would allow a TC pigtail.
Then there was a huge 30 Amp DPDT switch, that totally disconnected power, because a lot of our systems had direct access to the leads. A power cord and a Nema 5-15. A front panel fuse of your choosing.
Since a fair number of controllers had Rem in/ Setpoint; it made sense to have EXT/INT and ON/Zero switches on the front. Thus. we could read the temperature when the controllers were "off".
the EXT connection was brought out through the back and so was "Measured Value". Invaluable for strip-chary recorders. Later replaced by auto-tuning controllers.
To round thongs out, a POT was used for current limit It may or may not have been connected. All unites were sent back to have the same wiring,
The company later went with much longer controllers with a more conventional output like 4-20 mA,
==
The same "modular design" continued with some new features. 120/240 inputs (Not auto changeover) with the same twist lock designed for both.
120 VAC control power. one/two fuses on the front panel depending on 120/240. Lower fuses protected the SCR fuse, $1 vs $30 a pop.
A generic connector that could be re-configured. RS232 and.or analog etc. An output twist lock.
The ON/OFF switch actually disconnected the output via a relay and indicated so with a light when on. There was an EXT/INT as before. But now, they had to have power fail drop out as an optional feature.
Later, a few had to have a supervisor or a second thermocouple for protection. ALL modular; all in a 19" rack case.