Designed to help correct a swan-neck deformity of the PIP joint, these splints restrict abnormal hyperextension while allowing active flexion at the PIP joint. Murphy Ring Splints may be used on the PIP and DIP joints to provide lateral stability and joint protection. May also be used upside down on the DIP joint to provide prehensive stability. They can be worn on all fingers of the hand at the same time. For size, use the Murphy or a standard ring sizer to measure the involved joint. For half sizes, use the next larger size. Alternative sizing method is to measure the circumference of the PIP joint in centimetres. Murphy Ring Splint Kit contains one of each of the 12 sizes and a ring sizer in a plastic partitioned container.