Yes it’s like a split pin type of thing. I carry a brake bleeder which is just a pipe with a one way valve on just because I have had two occasions where it would have been useful.
I have all the wrenches and Allen keys in the sizes most common that my bike uses, plus some pliers, emergency belt joint, brake bleeder pipe, cable ties and a few nuts and bolts.
Just finished watching Black Earth Rising on Netflix, really deep, figured out the plot twist by the second episode but that’s the norm for me and it didn’t spoil the rest of the series.