A single piece gutter/gutter-guard screw has a head with a shoulder integrally formed thereto and a threaded screwing body integrally formed to the shoulder. A diameter of the threaded screwing body is smaller than the largest diameter of the shoulder's bottom, and a largest diameter of a top of the shoulder is smaller than a largest diameter of the head's bottom. The screw provides a gap that is a height of the shoulder when the screw is screwed into a substrate. An attached clip (in the gap) provides support for an attached wire or object and composed of a generally L-shaped body with a top member joined to a side member. A front slit in the clip provides entrance to at least an attachment structure within the top member, configured to fit onto the screw. An attachment mechanism is in the side member.