Hand and wrist wraps are used to compress and keep compressed when hitting the bones and tissues in the hand. Such compression may allow boxers to hit with greater force than if they did not use them. Boxers claim they feel less pain when hitting so their opponent may feel more pain.
The hands are delicate, when boxing can easily injure them whether training on the heavy bag or boxing against an opponent. Hand wraps protect the small bones in the hand from breaking, keep the skin on the knuckles from tearing and help prevent you from spraining your wrists when delivering a solid punch.