1 inch x 4.9 yards Clear 3 M - dual lock fasteners. Advanced closure alternative to zippers, screws, snaps, bolts and more. Better than conventional closure Methods because they offer greater design flexibility, faster product assembly, smoother and cleaner exterior surfaces and improved product performance in many applications. Constructed with a Type 400 stem pattern to form a secure fastening attachment. Hundreds of closures with great holding power. Fasteners engage in any orientation eliminating concerns about misalignment, premature or Incomplete engagement. Fastens with an audible snap to assure secure closure.