3M Dual Lock Reclosable Fastener TB3551/TB3552 400/170 Black 1 in x 10 ft (1 Mated Strip/Bag) Five times stronger in tensile than typical hook-and-loop fasteners Durable enough to be opened and closed 1,000 times before losing 50% of its original strength Mushroom-shaped stems snap in place to ensure fastener is engaged General purpose acrylic adhesive bonds to metals, glass and medium to high surface energy plastics Trial bags offer a simplified "go-to" selection of stem density pairings Five times stronger in tensile strength than typical hook-and-loop fasteners Durable enough to be opened and closed 1,000 times before losing 50% of its original strength Mushroom-shaped stems snap in place to ensure fastener is engaged General purpose acrylic adhesive bonds to metals, glass and medium to high surface energy plastics Trial bags offer a simplified "go-to" selection of stem density pairings