Dont use them on your wrists while punching, legs for good footwork. It could put stress on your rotator cuffs, I believe.
I think you would be better off by avoiding both of these and instead using a weighted vest (w/adjustable lbs) You would be strengthing your legs and core at the same time as you slip and roll while boxing the bag. After a few training sessions (wk) you will see increased speed and power in your punches generated from stonger core and legs.