Closer Spring Arm are ideal for Doors / Gates upto 40 kg x 950mm wide , So easy to install, the laminated special spring steel is the secret to its power, can be mounted almost anywhere top, bottom, left or right. The arm lifts up and tucks away and the gate or door can be remain open, the rod arm that reaches out to the Door / Gate has a mounting adapter made from nylon which is attached to the Door / Gate. The Body is made of Aluminium and the tension of the spring is adjustable by the cap at the top.