The SmallRig HDMI Cable Clamp for A7S III Cage is compatible with the SmallRig 2999 cage for the Sony a7S III camera. The clamp is designed to prevent the HDMI cable from pulling or accidentally disconnecting. It mounts onto the side of the cage using one 1/4″-20 screw, which is secured with two anti-twist pins to prevent twisting. The cables are secured with an easy-grasp, knurled 1/4″-20 screw. The screw adjusts a sliding block that can be tightened to accommodate different cable diameters. An Allen wrench is included to secure the mounting