Anchor screws are used to hang light- to medium-weight objects from walls and ceilings. What makes the anchor screw popular is that it can be used anywhere without the need to be attached to a stud. While these are most used with drywall anchors, there are screw anchors that are made specifically for concrete and masonry. Head styles include hex, flat/phillips and wafer. Make the job easier with anchor setting tools, wallboard anchors, cordless drills, and drill bits.