Intamin LSM
A Intamin LSM module commonly used for their launch coasters.
The Tolerances are zero because of how tightly the two pieces need to be tight fit. I had to sand the Mount part down a bit for it to fit. The holes are for using a drill to secure it and to mount it to something. If you don't drill it, it looks better with only the small holes. I used Fusion 360 to design this.
Happy Print :)
(I modeled this myself but credit to AmusementLabs for the dimensions of this part)