1, first remove the screw cap; 2, then use the hammer to knock the screw into the wall; 3, and then use the pliers to pull the iron outside the screw first, after pulling out the iron, use the pliers to clamp the screw; 4, the last side of the shaking while using the small hammer to hit up and down, shake a few times, you can easily take it out.

the expansion screw is threaded at one end and tapered at the other, which is a good accessory. it is often used in our lives, and it mainly plays a fixed effect. for example, sometimes when hanging some large paintings, the expansion screw is often used, but if you want to change the place, the expansion screw is difficult to remove.

take the expansion screw can not use brute force, take the expansion screw to remove the screw cap first, and then use the hammer to knock the screw inside the wall, and then use the pliers to pull the iron outside the screw first, after pulling out the iron, use the pliers to clamp the screw. then while shaking, use a small hammer to hit up and down, shake a few times, you can easily take it out. some are very strong so that they still can't pull out, use a chisel to chisel around the point and then pull out while turning, such as this is not out, with a six-mm electric hammer drill directly into it, the depth is not lower than the depth of the screw, and then use the pliers to clamp the outer ring while turning the edge to pull out, so that the most stubborn expansion screw can be taken out.