The Gamber-Johnson Mongoose locking slide arm can be used with laptop cradles and docking stations. The 9-in. locking slide arm can be mounted on most upper pole assemblies. It can extend 4 in. and locks into place when pushed back to the original position. The Mongoose is offered with an optional motion attachment, which allows vertical tilt and 360-degree rotation. The no-drill design uses existing upper pole products. It is made of heavy gauge, black powder-coated steel.