A tool I made years ago but remade now that I know how to actually CAD correctly.
This is a tool helps you take the end cap off as well as ‘cock’ the striker so you can put the bolt back in your rifle since the spring inside can be rather stiff and can't easily move the end cap. Also nice tool to have if you want to replace it with something different.
The original version I made of this can be found here
https://www.printables.com/model/1090130-tikka-t3x-bolt-disassembly-tool
The author marked this model as their own original creation.