What sets the ROLL-N-LOCK cover construction apart from the competition is not just the superior quality of the vinyl surface material, but also the design of the slatted aluminum substrate which supports the vinyl. Each ROLL-N-LOCK slat is rotatively joined by an interlocking hinge. It is the geometry of this uniquely-contoured hinge that lends ROLL-N-LOCK its strength, roll compactness and quiet, smooth, non-binding movement. Close examination of the ROLL-N-LOCK hinge in the flat position reveals the fact that each slat is inseparably locked together, yet when rotated, no metal-to-metal contact occurs.

The ROLL-N-LOCK bed covers are by far the most sophisticated and versatile retractable truck bed cover made.