This is a set of four plastic-coated steel Cinesaddle Stirrups that are designed to mount on a vehicle, boat, or other mobile platform and create an anchor point for securing your Cinesaddle. Each Stirrup is a steel frame that is approximately 4 x 3" and is designed to mount and remain on various places on your platform while under tension. For example, you can use the Stirrup to create an anchor on a car's hood, door panel, or bumper. Although primarily used for exterior mounting, the Stirrups allow you to be creative in finding anchor points.