The all-aluminum A-Series retractable tonneau cover is built with the same rugged durability as the well-known M-Series. This ground-breaking product includes a long list of innovative design features that only Roll-N-Lock can provide. The unique, powder-coated aluminum cover body of the A-Series is bound together by patented hinge technology that delivers a nearly impenetrable seam. Unlike other aluminum bed covers that provide only �out of sight, out of mind� security, Roll-N-Lock's A-Series is the real deal. With no exposed rubber seams and a patented tailgate locking system, knife-wielding thieves don't stand a chance. Just like its M-Series counterpart, the A-Series' tonneau cover permits opening or closing in seconds, there are no snaps to manipulate or heavy folding panels to lift. A simple rotation of the lock lever and the cover retracts into Roll-N-Lock's ultra-compact housing offering easy and instant access to the entire truck bed. A chain is only as strong as its weakest link. This phrase has never been more true than in the case of retractable truck bed covers. With a brief Internet search, many truck owners will find there to be an inherent security flaw built into the majority of aluminum retractable covers. After all, what good is aluminum when a thin piece of rubber is the only thing that stands between a thief and the contents of your truck bed? By concealing its heavy-duty silicone hinge with an offset aluminum seam, the Roll-N-Lock A-Series is resistant to knives and other sharp objects guaranteeing a never-before-seen level of truck bed security.