1. It is made of carbon steel, has hardness, and is not easily damaged. It can meet all your daily needs. 2. Easy to use 1. Drill a hole with the recommended diameter. 2. Tap the anchor into the hole until it is flush with the surface of the base material. 3. Attach the setting tool to the head of the screw. Press to expand the anchor. 4. Insert the screw through the fixture and then back into the anchor. Tighten the screw until the fixture is secured. 3. Quick installation with manual or pneumatic tools The tool makes it easier. You can use 2 wrenches or pliers. 1. Hold the nut in place to prevent it from rotating after inserting it into the hole. Screw in the correctly sized bolt. Tighten the nut with the other wrench/pliers. As you tighten the bolt/screw, the nut will compress and lock in place. 4. Well nuts with screws for almost anything I used these well nuts to the missing lower third of a bolt hole on a square side mirror. They are recommended for applications like mirrors, etc.