Treat Individual Fingers with Multiple Splints. Sometimes a patient has instability in more than one joint of the same finger. SIRIS™ Splints are the only splints available that may be easily combined on the same finger to provide support to each individual joint. This ability to use two separate splints on the same finger at the same time allows you to solve complex problems in a creative way. And because each SIRIS™ splint is custom sized for an individual joint, it will not interfere with another splint on the same finger. When splints are worn in combination, you can still individually adjust each splint for a perfect fit.