The RollTrac manual cover is the world's most durable tonneau cover for the Chevy Silverado and GMC Sierra 1500 trucks. This premium aluminum truck bed cover is engineered to rigorous global manufacturing standards and has been awarded 10 international patents. The manual Rolltrac glides with ease and securely locks in place keeping your contents dry and protected. Designed to withstand the harshest elements and tampering, this aluminum truck bed cover is built for long lasting use. Not only does this bed cover provide levels of security previously unheard of in the hard tonneau cover market. Additionally, it creates a unique style for your vehicle.