What is the name of the belt tied to your hand when practicing martial arts?

It's called a bracelet to protect your knuckles and wrists. It's basically three meters or four or five meters in length. Personally, I am used to the length of four meters and five meters, because it is long enough to completely protect it (the price ranges from about twenty dollars to thirty dollars)

Although the bracelet is a protective preventive measure, the best way is to wear gloves, which is more appropriate.