BoxRec

What is the real name for these things?
I have seen some fighters train with them but never seen them on any websites etc.

Any ideas or links? (preferably UK sites)

Ones I've seen are ones that people have made themselves. I tried my mates one, about 1/2 elastic stitched to fit around the head with a few knots in the other end stuffed into a small hole in a tennis ball.

It called a "Fight Ball Reflex" https://www.amazon.com/Reflex-Exercise- ... B01GE12YWU

If you're crafty, you can make them with special tools, or you can buy them online... You need a bunch of them because they wear out very, very quickly compared to a speed bag, heavy bag, double-end bag, skip-rope, bag gloves, sparring gloves, headgear, protector, gum shield, or any other equipment... Even Le Roy hand wraps last longer and don't need replacing as often...