One bar prison. I just loved the fact Zero's fat ass was held still for me via his asshole haha. This was really effective! I made sure most of that metal dildo was inside him so he had to stay as still as possible and couldn't bend his knees at all. Canes are fun, but I like the consistent heavy hits you land with a flogger. Ideally, I'd want a metal dildo with much more girth for this sort of set up to give him more to think about, but sourcing one is harder than you'd think...