Easy to use ROM hinge with quick-adjusting flexion and extension stops to control and limit knee flexion and extension. Telescoping calf and thigh sleeves for sizing a wide range of patients from 5 to 64 tall. Easy to use extension drop lock allows the brace to be locked out in 5 positions (in -10 degrees, 0 degrees, 10 degrees, 20 degrees, and 30 degrees).