Saw these in Jujis video with Daniel Strauss and had to get them these are easy straps you can place on your pull up bar to hang grip implements from for pull ups or hangs.
Is this a circus dumbell? No. what is it? I am not sure the best way I can describe it is an axle loadable dumbbell. I welded the sleeves on and grinded it, it is fat boy
I used these for a while I did a lot of pin press on them and beat them to shit along with the bar, I would recommend using something with a plastic safety liner