For PIP extension limitations of 45º or less. The adjustable spring extension splint to assist the proximal interphalangeal joint into increased extension. Provides more forceful extension assistance than the Extension Finger Splint 7053. Also has a lesser extension effect on the metacarpalphalangeal joint. Force of 3.75" lbs. (1.4kg) when flexed 45º or more. 1.75" (653g) at full extension.