It uses three needles of 0.4mm diameter normally used for cleaning 3D printer nozzles. The needles I had used have 35mm long coil part.
One M3x6 or M3x8 screw is used to secure the bottom part the the upper one.
I have used Fuzzy skin on outer wall of the upper part. It makes it easier to grip.
The author hasn't provided the model origin yet.