polio calipers polio calipers are an important for individuals affected by polio, helping them to improve their mobility, independence, and quality of life. Polio calipers are custom-made to fit the individual's affected limbs. Polio calipers with different knee joints are designed to accommodate the specific needs of individuals with polio who have varying degrees of knee instability or weakness. Locking knee joints can be manually locked into a fixed position, providing additional stability and support during weight-bearing activities such as standing or walking. They are beneficial for individuals with significant muscle weakness who require extra support to prevent knee buckling. An auto-lock orthotic knee joint, also known as an automatic locking knee joint or a stance-control knee joint These knee joints are designed to automatically lock into a fixed position to provide stability and support during weight-bearing activities, such as standing or walking.