This Pace Edwards UltraGroove 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 weather resistant padded AmorTek deck lamininated to rigid 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. Three year warranty. Price listed is for short bed truck and model for long bed truck is $80 additional ($1729). Installation available at an additional $89.95 charge.