HARSKIYER 18 Pcs 3 Inch Vinyl Shutter Fastener with Reverse Barbs, Universal Window Shutter Spikes for Wood, Vinyl, Brick & Stucco Siding (Black)

["18-Piece Bulk Pack for Multiple Projects: This generous set of 18 shutter fasteners provides ample supply to securely install multiple sets of shutters. Ideal for both new installations and replacements, ensuring you have enough hardware on hand to complete your job without interruption","Long-Lasting Black Vinyl: Crafted from resilient vinyl material, these shutter hardware pieces are designed to endure outdoor conditions. The black color is integrated throughout the material, offering resistance to fading from sun exposure and eliminating the risk of rust, ensuring they maintain their appearance over time","Secure Grip with Reverse Barb Design & Wide Head: Each fastener features a practical reverse barb design that helps prevent it from backing out once installed. The wide, flat head sits securely against the shutter, providing a reliable hold that helps keep shutters firmly in place, even in windy conditions","Simple Push-Button Installation on Various Surfaces: Installing these shutter screws is straightforward. They can be pushed into pre-drilled holes in a variety of siding materials including wood, vinyl, aluminum, brick, and stucco. This simple process offers a clean, tool-friendly installation experience for DIYers and professionals alike","3-Inch Universal Size with Application Guidance: At approximately 3 inches in length, these fasteners are suitable for most standard vinyl shutter installation needs. A general guideline is to use about 8 fasteners per shutter for units under 55 inches in height, and up to 12 for taller shutters, ensuring a secure and balanced attachment"]