Panel Sheathing Clips are used to brace unsupported panel edges when sheathing meets edge-to-edge without a rafter for support. Select the same size sheathing clip as the panel thickness. Keeps panels even for a level plain on the structure. Quick installation, no nails needed. Provides a 1/8" gap between plywood panels as recommended by the American Plywood Association. 20-gauge galvanized steel.