The invention can include an articulation link having a body with a first surface located proximate a first end of the body and a second surface located proximate a second end of the body opposite the first end. A cavity can extend from the first surface to a cavity contact surface located between the first surface and the second surface. A protrusion can extend from the second surface away from the first surface to a protrusion contact surface. The protrusion contact surface can be generally curved to engage a cavity contact surface of an adjacent link. A protrusion sidewall can engage a cavity sidewall of the adjacent link.
