You drill a hole and stick the thick part into the drywall. You can then attach a towel rail or shelf bracket. It has a large footprint to ensure you don't tear out drywall. You can use it on other materials too, but they're great for drywall. We ripped a towel rail off the wall and had to put it back up which was great. Stronger than what was previously used. Others are just a plug and they don't work. The wings on them have a large gripping surface. They can't jump up and down on them, but they can catch a fall and not break free. These are the ones you use in any bathroom or kitchen where they aren't attached to the counter, just attached to the drywall.
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