The 3M™ Hook Fastener SJ3532N is one part of a two-part fastener solution designed to provide great durability for thousands of closures. With its medium-tack, rubber-based, pressure-sensitive adhesive backing, this fastener allows for easy and convenient attachment to a variety of substrates, including plastics. This fastener is an attachment alternative to a wide variety of closures, including zippers, screws, snaps, hooks, and more. Covered with flexible J-shaped hooks, this fastener features about 300 hooks per square inch (46 hooks per square cm), which protrude up from a woven backing. Commonly paired with 3M™ Loop Fastener SJ3533N, this hook fastener can also engage with other 3M™ Loop Fasteners. To ensure stability and flatness, both the hook and the corresponding loop are preshrunk.