1. Remove the screw cap first; 2. Then use a hammer to knock the screw into the wall; 3. Then use pliers to pull out the iron sheet outside the screw. After pulling out the iron sheet, use pliers to clamp the screw; 4. Finally, shake it while tapping it up and down with a small hammer. After shaking it a few times, it can be easily taken out.

The expansion screw has a thread on one end and a taper on the other. It is a good accessory. It is often used in our lives, and it mainly has a fixed effect. For example, sometimes expansion screws are often used when hanging some large paintings, but if you want to change the location, the expansion screws are difficult to take out.

You cannot use brute force to remove expansion screws. To remove expansion screws, you must first remove the screw cap, then use a hammer to knock the screw into the wall, and then use pliers to pull out the iron sheet outside the screw. After pulling out the iron sheet, use pliers to clamp the screw. Then shake it while tapping it up and down with a hammer. After shaking it a few times, it can be easily taken out. Some of them are very strong and still can't be pulled out. Use a chisel to chip away at the surrounding area and then pull it out while turning. If it still doesn't come out, use a six-millimeter electric hammer drill to drill directly in to a depth no less than the depth of the screw. Then use pliers to clamp the outer ring and pull it out while turning. In this way, the most stubborn expansion screw can be taken out.