What is this connector (and the eventual pliers used for it) that serves for Wago 256 terminals.
Electronic – Identify this flat connector
connectoridentification
Related Solutions
The cable is a "flat flex cable" (FFC). The connector is one of several hundred different types made for FFCs. Without a LOT more information it would be almost impossible to narrow it down further.
For starters, we don't know the manufacturer. Look carefully at the connector and there might be some identifying marks. Next would be to know what the conductor pitch of the cable is. Common values are 1.0, 0.8, 0.65, and 0.5 mm. Those two pieces of info, along with what you've already given us, might narrow it down to at least a product series.
This is an obscure connector! They are Delphi Pack-Con III terminals. This style of connector is often used to hold blade fuses. The State Wire and Terminal catalog shows several of them:
The male pins don't really match the picture here, but the female pins definitely match. It seems that instead of crimping them, this board has soldered them vertically.
Best Answer
Those look like ordinary insulated crimp ferrules. A search for "ferrule" on Mouser, for example, returns lots of results like this. The crimp tool that you select will typically depend on a number of factors, including the brand of ferrule that you select and whether or not you want a hand crimper or production-quality tooling. Any decent-sized supplier should be able to help you identify the tooling options to match the ferrule that you select for your application.
There's nothing magic to match a Wago 256, as it is an ordinary terminal block with a cross sectional area range of 0.08 - 2.5 mm² per the datasheet. Any ferrule that meets this requirement should work just fine.