Features a secure wedges grip that prevents slipping or falling off during setup Designed to seamlessly fit over window surrounded by brick, wood, or stucco that project outwards at 90 degree angles, adjacent to recessed window The clips firmly grip the plywood like a box spring clip, ensuring a stable and secure hold throughout the installation process, which can be easily managed by a person These board up clips a straightforward, quick, and cost-effective solution for protecting window during severe conditions and Remove: Simply slide the clips onto the plywood and press down on window frame; when you want to remove it, slightly bend the serrated section, Manufacturer: BELOWSYALER