The LMB Spring-Coil Finger Extension Splint features coil springs that are placed laterally to the PIP joint and move in line with the joint to increase extension. It is ideal for boutonniere deformity, and allows IP flexion. Curved proximal and distal support distribute pressure evenly. The amount of resistance is adjusted at the distal strap. To size: measure the finger from the palmar crease to the distal finger crease.