When attaching PALCLAD Pro PVC panels directly to a surface, use these white Nylon Rivets in conjunction with adhesive to provide dependable mechanical fastening. They help hold panels firmly in place for a clean installation over drywall, concrete, wood, metal, and other surfaces. A practical complement to adhesive, the rivets ensure a successful installespecially useful on busy job sites. This pack includes QTY 50 individual rivets, each of them is 3/4 of an inch long.