[Support and Stabilisation]: The finger splint is designed to straighten and immobilize the full finger knuckles while protecting the finger and thumb joints [Coil Springs Design]: A dynamic splint with coil design provides balanced traction; Ideal for PIP and DIP joint flexion contractures and Boutonniere deformity [Indications for Use]: The finger extension splint helps reduce tightness in the PIP joint, flexion contractures, and boutonniere deformity; Maintains assisted extension at the PIP joint while allowing active flexion and can be used for soft tissue injuries affecting the PIP joint with possible flexion deformity [All Sizes of Finger Joint]: Size S: Finger Circumference below 5.5cm, Size M: Finger Circumference 5.5–7cm, Size L: Finger Circumference above 7cm; 3 sizes available to accommodate various finger joint sizes [Soft Sponge Lining]: Stainless steel frame with soft EVA gasket for high mechanical strength and corrosion resistance; sponge lining absorbs sweat, breathable, protects fingers from scratches, providing a comfortable wearing experience