The technical low-profile 3M SJ4570 hook and loop fastener is composed of mushroom-shaped heads and clear LSE acrylic adhesive. It is suitable for both interior and exterior. Allows self-connection - the headers interlock with each other upon contact and pressure. Provides lower joint strength than the classic Dual-Lock, but the connection is stronger and more stable than the Hook & Loop system. Withstands up to 100 cycles of connection and disconnection.