3M SJ355D Dual Lock, 25mm x 5M twinpack. More than 1000 openings and closings. Five times the strength of conventional hook and loop fasteners. Coated with VHB acrylic foam tape for indoor and outdoor applications. Ony 1 product: locks onto itself. This product is up to 12 times stronger than traditional hook & loop technology. And is durable enough to be opened and closed 1000 times while maintaining 50% of its original strength, making it easy to use and last longer. Foam tape backing allows for better contact with textured or irregular surfaces such as access doors, panels, signs, display components, and many other frequently opened and closed parts. Use to attach opening and closing parts for access doors, panels, signs and display components. For our full range of 3M products, click here.