Features: Feature a practical reverse barbs design that ensures they are secured in place without sliding. The elegant black color enhances the overall aesthetics of window and the exterior of the home, and enhances the visual appeal of the shutters. Make of nylon that is strong, stable, resilient, won't fade or rust, and will last for a long terms so you not have to worry about the color peeling or cracking. Easy to install: First mark the position of the shutters. Next pre-drill holes in window and wall for later installation of the fasteners. Finally aligns the location and begin installation, using a hammer to gently tap the fasteners to avoid over tightening. These fasteners can be used to install any type of vinyls shutter over a variety of siding materials such as wood, aluminum, vinyls, stucco, brick, masonry, or cardboard permanent weatherproof installation. Specifications: Component: Nylon Length: about 7.62cm/3inch Package Includes: 36Pcs vinyls Shutter Fasteners note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.