This chapter presents the indications, materials required, and the application of the different types of splints used to stabilize broken bones of the arm and leg. The splints include sugar tong splints, double sugar tong splints, reverse sugar tong splints, volar splints, dorsal splints, posterior long-arm splints, stirrup splints and radial gutter splints. In addition to splinting, various immobilization devices can be utilized by the ED provider to facilitate patient comfort and healing, while stabilizing the injured area. These include hinged knee braces, figure-of-8 braces, boot immobilizers, and arm slings. Instructing the patient on the proper use of immobilization devices is crucial to prevent further complications, i.e., DVT or nerve palsies. Dynamic splinting and figure-of-8 braces are examples of advanced immobilization devices.