2 X 150 ft black 3m sj3551 dual lock fasteners 1 roll case 3m dual lock reclosable fastener sj3551 is the convenient alternative to traditional fastening methods such as screws nuts or bolts. It is designed to deliver a durable reclosable fastening solution which can be opened and closed multiple times which bonds to a variety of substrates including metals and plastics such as acrylics polycarbonate and abs. Durable and secure 3m dual lock reclosable fastener sj3551 has exceptional strength through its interlocking mushroom-shaped heads 400 stem density per square inch providing up to 5x the tensile strength of typical hook-and-loop products. We designed this fastener with a white acrylic conformable foam tape protected by a removable film liner. This solid pressure sensitive foam tape features a strong durable bond that is heat chemical and uv resistant. With 3m dual lock reclosable fastener sj3551 there is no need for any drilling screwing or sewing tools which makes for quick installation.