Is there anything you can do with your forearms if you don't have a barbell, a collar, a horizontal bar, nor a rope machine? I have dumbbells and a couple of bands, though.
I've been watching this video. The guy in the video said you could use a band in one exercise, but it's still attached to some machine. I sometimes fix it to a radiator for some exercises, but it seems it would be to low for this. He says that wrist curls are not good for you. The only thing I could do from that video is those farmer carries, but walking around my room with dumbbells would feel too stupid.
UPD: Instead of a mace, you can use a dumbbell loaded only from one side. It was a great discovery of mine