The BAKFlip CS (Contractor Series) Rack System works with the F1 or G2 tonneau cover. This perfect combination gives you the freedom to work hard and play harder by hauling nearly anything in your truck bed or above on the rack. The CS comes with one of two BAKFlip tonneau covers: the F1 or the G2. The F1 uses FRP construction that is powder-coated and can hold up to 400 pounds evenly distributed. The G2 has an aluminum construction that is powder-coated and can hold up to 300 pounds. The cover folds up for total cargo access allowing you to haul larger items without removing your tonneau cover and can accommodate a variety of load sizes with Sliding Locks and Tie Downs to optimize your cargo capacity. Installation requires no drilling. Simply use the no-drill clamps and have the system on your truck in less than an hour. Get 24-hour theft protection without stopping your daily access to your truck bed.