This retractable bed cover by Truck Covers USA is the toughest, best looking retractable aluminum cover available and enhances the look of any truck with its low profile design and textured black powder coat finish. Durable and secure this cover is made of double wall aluminum slats and can hold 500 lbs. on top. Easy to operate and secure with its built in locking mechanism. Automatically locks every 12 inches so you can drive securely with it partially open when carrying taller cargo and it takes up less room in your bed with the smallest canister on the market (8x8 inches). Even improves gas mileage 7-10% and is very weather resistant with its 4 way drainage system. Installation available at an additional $80 charge.