Universal Rail Clamp Features This Universal Rail Clamp can position surgical devices anywhere along standard operating room table side rails. Use the Schure Socket to halt all movement on mounting posts as well. Clark Sockets by SchureMed are designed for a wide-range of purposes; affixing most operating room table accessories to most OR table designs and brands Spring-loaded and attaches to O.R. table side rails anywhere along the rail It accepts both 5/8″ (1.6 cm) diameter and 1″ x 3/8″ (2.5 cm x .95 cm) flat bar mounting posts Holds all accessories in the vertical and horizontal position Patient weight capacity is 350 lbs (158 kg) Locks securely with a simple twist of the ergonomic handle