Smooth, uni-directional locking mechanism enables the caregiver to set rigid fixation with one hand. The hinged upper brace accommodates all sizes of patients while the structurally enhanced design enables the staff to apply pressure both medially and laterally. The ratchet-style securement strap easily adjusts for the precise amount of compression. Holds legs up to 35 (89 cm) in circumference. Attaches to the surgical table side rail using a Clark Socket.