Hurricane window clips for plywood. Inch plylox” pack of 20 Design features: The ingenious, inexpensive, non-destructive, fast effective, easy to use way to protect your windows from high winds and airborne debris. Plylox(tm) window clips are patented h-shaped carbon steel clips engineered to fit 1/2 inch plywood/osb without nails, screws or adhesives. Installed in seconds, plylox(tm) window clips slide onto the edge of the plywood/osb sheet which is then easily inserted into the exterior window. No drilling holes. The plywood/osb can be removed in seconds without tools. Proven in hurricanes katrina, rita, and charley. Replace the panel, not the window(tm) clip usage requires an inset window for the clip to grab (brick, stucco, etc.)