A wrist splint is a brace that looks like a fingerless glove and stabilizes the wrist in a straight and sometimes slightly bent-back position. A wrist splint can be worn to support the wrist while holding it firm and still (immobilizing it).
A good wrist splint should:
Splints are available without a prescription from a drugstore or with a prescription from an orthopedic or medical supply house. Physical and occupational therapists can custom-fit splints made from lightweight materials. Health professionals usually do not recommend long-term use of splints (more than 72 hours) because the muscles in the hand or wrist can become weak.
WebMD Medical Reference from Healthwise