CRL Toggler&reg; Hollow-Wall Anchors for 3/8" to 1/2" (9 to 13 mm) - Package of 100 Install Quickly and Securely Maximum, Reliable Holding Power in Concrete, Sheet Metal, Plywood, Paneling, Drywall, Hollow or Plaster Walls, and in Hollow Core Doors Use With Wood or Sheet Metal Screws from #6 through #14