[Support and Stabilize]: The finger splint effectively straightens and immobilizes the full finger knuckles while protecting the finger and thumb joints [Indications for use]: Finger extension splint helps reduce tightness of PIP joints, flexion contractures and boutonniere deformities; maintains assisted extension at PIP joints while allowing active flexion, can be used for soft tissue injuries affecting PIP joints, and possible flexion deformity [All sizes of finger joints]: Size S: Indicates below 5.5cm, Size M: Indicates finger circumference 5.5-7cm, Size L: Indicates 7cm and above; Choose from 3 sizes to fit your finger joint size 1. Coil Spring Design: The Finger Extension Splint has a coiled spring that provides dynamic extension while allowing active flexion; the coil springs are placed on both sides of the PIP joint for balance and strength. 2. Usage: It is suitable for various causes of joint extension dysfunction. 3. Practical support: suitable for PIP joint flexion contracture. Provides support at the MP joint. 4. Soft EVA Pads: Curved proximal and distal pads distribute pressure evenly. 5. Spring coil extension splint: Relies on the elastic force of the spring to straighten and fix the finger. At the same time, the fingers can be actively bent and can overcome the force of the spring for rehabilitation. Material: EVA + stainless steel Scope of application: Suitable for insufficient straightness or bending of fingers after finger injury or long-term arthritis. Applications: Sprained fingers, fracture fixation, underextended fingers, mallet fingers, tendon ruptures, etc. Dimensions: Size S: Below 5.5 cm / 2.2 inches Size M: Finger circumference 5.5-7cm / 2.2-2.8 inches Size L: Circumference above 7 cm / 2.8 inches