1.FEATURE: The SJ3550 resealable dual lock closure is the practical alternative to conventional fastening methods such as screws, nuts or bolts. It is designed to provide a durable, resealable (which can be opened and closed several times) mounting solution that adheres to a variety of substrates, including metals and plastics such as acrylic, polycarbonate and ABS. 2.: Black interlocking mushroom heads provide a strong, reliable and durable closure that can be opened and closed again and again. The black adaptable acrylic foam tape adheres well to a variety of surfaces, including metals and plastics such as acrylic, polycarbonate and ABS. The strong clasp secures with an audible click and confirms the closure. It has good resistance to temperatures (93°C). 3.APPLICATION This mushroom fastener with double lock SJ3550 uses an acrylic adhesive to bond a range of materials with surface energy, including some plastics, metals, glass and painted surfaces. Allows for quick and easy installation without mechanical assembly. After gluing, the interlocking mushroom stems can be fixed, coiled and riveted, but are easily separable and accessible for fixed items. 4.Installation and disassembly: at room temperature, about 50% of maximum strength is achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours. By spraying alcohol on the tape, it is easy to peel off. Please clean the adhesive surface and do not touch the adhesive layer before use