The Whirly Jig arrives without adapters due to the endless variety of automobile types out there. You will have to custom-fabricate the adapters that tie the Whirly Jig to your vehicle. All you need is raw stock and someone who can weld. Whirly Jig supplies the on-unit adapters (arrow), which serve as a connection. The rear adapters consist of 1-1/2-inch angle iron (12 inches long) and 1- by 1-1/2-inch (5 inches long) which are welded together. The Mustang’s rear bumper bracket holes serve as attachment points.