So I bought a small box of tap wrenches, and it had a dollar general dial caliper in it, as well as this. The guy had no idea what idea it is, and neither do i, he seemed to think it had to do something with machining
The "roller has 2 textures and 3 different sized wheels that thread on.
Rasp sounds reasonable, but I worry that you’ll lose the microSD card you’ve got there … 😅
Mmm tasty snack acquired