The screws paired with these drywall anchors are made of carbon steel, which has better rust resistance than regular screws. There's no need to worry about the anchor screws becoming weak due to rust. The main body of the anchors is made of sturdy zinc alloy, different from most regular plastic sheetrock anchors. Their unique cracked design makes fastener installation more convenient, avoiding the problem of easy breaking or falling off during installation. The usage process is very simple. The accompanying screws are self-tapping screws, requiring no pre-drilling or pilot holes. With just 1 drill bit, you can install as many as you want on sheetrock and drywall. They are suitable for hanging bathroom and kitchen accessories, shelves, light fixtures, mirrors, picture frames, curtain rods, and small decorative shelves, but it should be noted that they are not suitable for concrete and brick walls. These anchors have a reinforced structure, making them sturdy and durable, with a holding strength of 50 lbs. They solve the problem of regular anchors being easy to pull out or fail. In addition, the self-drilling drywall anchors adopt a deep thread design, which is safe and reliable for use on drywall, stably fixing various light to medium-sized items.