Size Runs and Matching Screws for Hollow Wall Anchors
Kits in this selection feature drywall anchors, also commonly called hollow wall anchors with matching screws to hang fixtures on drywall or sheetrock securely, and without damaging the wall.
Drywall anchors are typically made of plastic or metal or a combination of both to create threading for a screw. Most anchors slide in through a hole and then expand outward so they cannot be taken back out once installed. The anchor is usually threaded so that a screw may be threaded into the anchor to hold something to the drywall.
Here are a few resources that may help you find what you are looking for: