This Pace Edwards UltraGroove Metal retractable bed cover is really versatile with its built in rail expansion system, ready to help you gear up for your next adventure. Many Yakima, Thule, and other racks easily install on the T-slotted side rails giving you access to dozens of racks for carrying bikes, kayaks, cargo baskets, and more (Racks sold separately). With or without racks, the UltraGroove is incrediby easy to use and the cover is made of heavy gauge aluminum panels. It opens quickly with just a turn of the lock knob and closes just as easily with a pull on the built-in strap and can engage every 12 inches along the rail. No drill clamp on installation. Matte black finish makes every truck look great and the turn knob and hand grips are located on the underside for a streamlined appearance. Made in America and backed by Pace Edwards "Ultimate Lifetime Warranty"... no one else offers that! Price listed is for short bed truck and model for long bed truck is $100 additional ($2399). Installation available at an additional $99.95 charge.