Carpal-Lock Wrist Splints help sustain a neutral position limiting excessive flexion, hyper-extension and ulnar deviation. The Carpal-Lock provides effective, custom-fitted splinting on the posterior surface of the hand, wrist and forearm with no compression at the wrist. Its open design makes it comfortable as a night splint. Measure palm width at base of fingers for sizing. Order for Right or Left hand. Non-returnable.