These screw-attach single or double mounts are designed for horizontal mounting to any secure interior location that accepts bolts or screws for permanent installation on walls, in utility vehicles, toolboxes or out-of-sight locations such as under trunk lids. The powder-coated steel mounting brackets has aluminum hooks with a protective lining so it doesn't mar the gun or bow finish. It is easy to install with the included self-drilling screws or with bolts, nuts and washers.