The Acebikes Flexi Hook 4 pack D-ring mounts can be folded flat when not in use. Two pre-drilled holes make them easy to install. Both pieces are zinc-plated to prevent damage from, for example, rust. Durable D-Ring tie-downs with high-strength steel construction for strength and durability. For your flexibility, create an anchor point anywhere you want to tie down your motorcycle easily and securely in any given situation and for any vehicle.