The Stainless Steel Finger and Small Joint Goniometer measures the range of motion of finger joints (metacarpophalangeal and interphalangeal) and other small joints including toes. The head has two opposing 180° scales which are marked in 5° increments. The easy to use goniometer allows the therapist to use only one hand to measure 110° flexion and 40° hyperextension. The linear scale has inches and centimeters.