Left, right, front and back. Four way machine works all the neck muscles. Arm pivots on precision flange bearings to provide a smooth action. Removable pin is used to restrict direction of head movement. Fully adjustable seat height. Durable textured. Black powder coat finish. Adjustable seat height for more efficient workout. Warranty: One year. Made from two square heavy wall steel tubing. 26 in. L x 48 in. W x 56 in. H.