3M Dual Lock Reclosable Fastener SJ3527N Black provides a strong reusable fastening solution using interlocking mushroom shaped heads that snap together securely. Designed for indoor and light outdoor applications, this fastener delivers higher tensile strength than traditional hook and loop while remaining easy to separate when needed. Ideal for mounting signs panels electronics and removable fixtures without drilling or hardware. The pressure sensitive adhesive bonds to metals plastics and painted surfaces.