SmallRig HDMI Cable Clamp for A7S III Cage 2981 is compatible with SmallRig Cage 2982. Designed to prevent the camera's HDMI cable from accidentally disconnecting, this clamp attaches to the side of the cage using a 1/4"-20 screw and two anti-twist pins. The easy-to-grasp Knurled 1/4"-20 screw adjusts a sliding block that can be tightened to accommodate HDMI cable of varying diameters. This Cable Clamp is constructed of a sturdy aluminum alloy and comes with an Allen wrench.