The U.S. Solid Metacarpal Splint, also known as a Boxer Splint is easy to adjust and offers superior comfort and support to speed up the healing process. It is intended for fourth or fifth metacarpal fractures. The malleable palmar and dorsal stabilizing metal stays are made of aluminium and are easily bent to immobilize the wounded fingers in the desired position. This splint will protect and support the fourth and fifth metacarpals without restricting the movement of the MP (knuckle) joints. The polypropylene felt liner provides superior padding and allows moisture to evaporate away from the skin. This splint has tightening straps that are made to prevent them from sliding on your hand while you’re wearing it. Whether you are purchasing a small, medium, or large splint, all the straps are adjustable making it possible for it to fit any hand. The difference between sizes has mostly to do with the length of the splint and the size of the wrist. A small is designed for someone with small hands and tiny wrists, a medium is designed for the average adult, and a large is designed for someone with much bigger hands and wrists. The U.S. Solid Metacarpal Splint is designed to stabilize your fourth and fifth metacarpals without being uncomfortable.