3M™ Dual Lock™ Reclosable Fastener SJ3561 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, glass and plastics such as acrylics, polycarbonate and ABS. - Snap-in-place installation replaces screws and nails, snaps and rivets. The fasteners consist of continuous polyolefin strips with polyolefin stems having a mushroom shaped top. Clear fastener is hidden when closed and provides clean, smooth appearance.