Aerodynamic Performance: Built with an aerodynamic, lightweight aluminum frame, this folding tonneau cover reduces drag while driving and stays quiet on rough roads. Enjoy smoother rides without worrying about extra fuel consumption Tri-Fold Design: This truck tonneau cover folds for quick access. Partial folding lets you load large items without detaching the cover. Rear locking clamps release only with the tailgate open, adding anti-theft protection and avoiding accidental opening No-Drill Installation: Equipped with quick-lock clamps and screw fasteners, our tonneau cover installs easily without drilling. The clamps have passed 5,000+ open/close tests and withstand -40℃ to 80℃, ensuring long-lasting durability without cracking Waterproof, Sunproof & Cold-Resistant: This upgraded fiberglass fold tonneau cover with high-strength PP support resists scratches and impacts. It fully seals to block rain and snow, withstands harsh sun, and shields your cargo from gravel and branches Vehicle Compatibility: This hard tri-fold truck bed tonneau cover fits 2002-2018 Dodge Ram 1500, 2019-2025 1500 Classic and New, 2003-2025 2500 3500 6.4 ft (76.3 in) standard bed without Rambox (not for split tailgate). Note: Measure your truck bed size