What roach or other invertebrate would be perfect for this piece of wood?

[Godot]

So, I have had this piece of wood for a while now...
and I cannot imagine what roach or other invertebrate would suit it in the new enclosure I'm trying to make.
It has a tunnel leading through it (inside, it has 2 different paths: one with a dead-end)
The tunnel is 6,5 cm ( 2,55inch) in diameter on entry and 3cm (1.18 inch) on the way out.
Do you have any ideas?

 

[BoyFromLA]

If you as me I would not use it as is, but to break it apart.

 

[Godot]

And then, what would you use it for, what kind of insect?