Permanent installation for horizontal mounting on walls, in utility vehicles, toolboxes or out-of-sight locations such as under trunk lids. Easy to install with self-drilling screws or with bolts, nuts and washers (all included). Mounts to any secure interior location that accepts bolts or screws; on roofs, in vans or trucks, boats, golf cars, off-road vehicles, specialty hunting and shooting vehicles, trailers. This holder allows you to adjust the space between the two hooks for greater flexibility. The mounting bracket is made of powder coated steel.