[Support and Stabilisation]: The finger splint is effectively to straighten and immobilize the full finger knuckles while protecting the finger and thumb joints [Coil Springs Design]: A dynamic splint with coil design provide balanced traction; Ideal for PIP and DIP joint flexion contractures and Boutonnieres deformity [Indications for Use]: The finger extension splint helps to 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 injury affecting the PIP joint with a 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 for choice to accommodate all variations in finger joint size [Soft Sponge Lining]: Stainless steel frame with soft EVA gasket, which has high mechanical strength and corrosion resistance, and sponge lining, absorb sweat, breathable, protect the fingers from being scratched, giving you a comfortable wearing experience