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.
your pretty right about that, when I went through are construction class was just taking apart bleachers, making porch swings and taking apart stuff to steal the copper, there was one time one of the freshmen cut the copper pipe to a dehumidifier, and it leaked Freon everywhere, ahhh good times. also, we used the money from selling the copper and benches to buy tools and wood for the next year. So it wasn’t really wood working, but it was still pretty fun.