The M-Series tonneau cover has the most compact housing of any retractable cover on the market. It averages only 7 ¼" deep to preserve your truck's most valuable feature – cargo space. The M-Series cover goes the extra mile when it comes to convenience. With the M-Series, there are no snaps to manipulate, no roll or bundle to lash down or stow, no crossbars to negotiate, no folding or solid hinged covers to combat, no fabric shrinkage to struggle with, and, best of all, no worries about the security of cargo. Its patented, clamp-on track design makes it easy to install with the use of special tools. The cover even has a finger insulation grip to allow you to grasp and use the handle with ease. With the turn of the lever and key, the M-Series truck bed cover slides open with a torsion spring stowed inside a 3" aluminum casing. The cover can be pulled back with a built-in pull strap for smooth operation. The cover also features a patented, ratchet-style latching mechanism, enabling it to lock in place at four open positions. The M-Series' unique vinyl-over-aluminum design combines the ease of a roll-up cover with the strength of a hard folding cover. The M-Series also has a patented, four-point locking system to lock the cover simultaneously with the tailgate. This retractable cover provides extra security underneath its vinyl top layer by having a patented aluminum undercarriage. The M-Series's aluminum material provides a tough, rigid surface with a contoured hinge design giving a smooth, frictionless rotation when the cover opens and closes. Made in the USA with globally sourced materials, the M-Series is backed by our US-based customer support team and a 3-year guarantee.