3M hook and loop fasteners offer great design flexibility, fast product assembly, smooth and clean exterior surfaces and excellent product performance in many applications. 3M fasteners consist of hooks and loops which engage to form a quick fastening attachment. To disengage the attachment of the hook and loop, simply pull the strips apart by hand. - 3M flame resistant loop fastener SJ3418FR is one part of a two-part fastener solution designed to provide great durability for thousands of closures. These remarkable fasteners can be opened and closed over and over, up to 5000 times before losing 50% of the original strength, for repeated access and repositioning.