Easily, quickly mount holders to the strut or frame on a golf car style or utility shooting vehicle, to an ATV rack, to the frame of the rugged gear shooting cart, nearly any round or square bar up to 1" or larger than 1". Infinitely, adjustable ball and socket design allows holder to rotate to best position and lock into place. Models with floor base hold gun stock down or barrel down. U-bolt, screw mount or clamp mount are the different types of holders.