Table Rail Clamp. The Mediflex^® Table Rail Clamp features a spring loaded quick attachment to position on any standard surgical table. It can be applied over 1 or 2 layers of drapes and can be used sterile or non-sterile. While designed specially for Mediflex® Table Mounted Products (Long Reach Universal FlexArm^™ Holder and Positioners, all StrongArm™ Holders and Positioners and the Mediflex® Lap-Rack Instrument Holder), it will accommodate most round bar posts ranging from ½” (1.27cm) to 5/8″ (1.59cm) in diameter.