The Manfrotto Folding Auto Dolly for Twin Spiked Metal Feet Tripods includes 3/8″ attachment which allows you to fix a head for low angle shooting. It folds legs for transporting and storage.Single lever braking system controls all three 3″ wheels and folds easily for transporting and storage.Also features a 3/8″ attachment on the center spider allowing positioning of a head for low angle shooting. Accepts tripods with rubber/metal retractable spiked feet.