I come across some caches that I haven’t been able to find that indicate requires TOTT. What exactly are TOTT and do you need them? The only ones I’ve done are the birdhouses one where I use a long paint roller so that’s obviously necessary. I did a nano size one that said it requires TOTT but it was a small ass magnet sized thing and I just found it using my eyes.

TLDR; What are TOTTs and do I need to buy TOTTs to do caches?