3M Dual Lock Reclosable Fastener SJ355D is a general purpose acrylic adhesive on the back of a black, polypropylene reclosable fastener. It is up to 12 times stronger than traditional hook and loop technology. Tough polyolefon mushroom shaped stems snap together to create the tensile strength to replace traditional fasteners. Fast assembly with no drilling. 'Invisible' fixing. High temperature and solvent resistant. Mushroom heads lock together replacing standard hook and loop system. Measure: 5.8mm x 25mm x 10m (2 X 5 Mtrs).