A stationary-mount swivel holder designed for quick cage attachment using the same cage mount system found on our higher-end swivel holders. Comes with a 4 in. post, cage bracket/lid bracket, stationary or rotating arm and height adjusters. Additional swivel mount options include: - freedom of movement over 4 axes (excellent for mice and guinea pigs) and - includes a counter balanced arm to remove any weight from the tethered animal.