ALUMAFOAM® / STAX PREFORMED SPLINTSPreformed AlumaFoam Splints are made of the finest aluminum for flexibility and strength, and are backed with high-density foam for greater resiliency and comfort. X-ray penetrable.Stax Finger Splints are designed to protect and support the distal joint of the finger in extension while permitting unrestricted movement of the proximal interphalangeal joint. The Stax Splint is normally used without padding. It is applied to the middle phalanx with a small adhesive strip, automatically elevating the distal joint to its proper extended position. In cases where the finger may be too tender, a larger size splint with padding on the inside should be used until it can be replaced with a normal size Stax Splint.