The unique, interlocking mushroom-shaped heads of 3M™ Dual Lock™ Reclosable Fastener SJ3550 snap shut and stay locked. They close with an audible snap to assure your design is securely fastened. Pressure-sensitive adhesive backing provides strong and durable bonds to metals (aluminium, stainless steel), glass, plastics (acrylic, polycarbonate, ABS) and paints.
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