PATENT-PENDING, UNIVERSAL 1/2", 5/8", 3/4" PLYWOOD, ONE-SIZE-FITS-ALL STAINLESS STEEL HURRICANE WINDOW CLIP mounts to 1/2" to 3/4" PLYWOOD boarding to the exterior BRICK window casings for quick hurricane and storm protection, WITHOUT THE USE OF ANY TOOLS. EASY TO INSTALL- WON'T SLIP OR FALL OFF DURING INSTALLATION - SECURE WEDGE GRIP. They securely grip the plywood during installation like a box spring clip; they never pop off during plywood installation like standard hurricane clips sometimes do, but use exactly the same original wedge-grip principle. NO special tools, caulking, adhesives or glue required. Easy to install and remove by one person. DESIGNED FOR USE DURING WIND STORMS - These Clips are made of heavy duty Spring Stainless Steel .030" thick. They ensure a super tough hold during the strongest windstorms. REUSABLE - HURR-PRO window clips are hard-wearing, rugged, rust-proof Stainless Steel and will last year after year. They can be reused over and over and are not affected by Plywood swell or thickness variations over time. Once installed, you never have to worry about them again. 100% GUARANTEE! Protect your home from high winds, storms and hurricanes. We guarantee this product to be defect free and provide an unconditional money back guarantee if you are not 100% SATISFIED.