Which type of anchor is recommended for easy removal in a solid concrete wall?

The correct answer is the wedge anchor, which is specifically designed for permanent installations in concrete. When it comes to the need for removal, wedge anchors have a distinct advantage due to their installation method and design. They consist of a threaded rod that is inserted into a pre-drilled hole in the concrete, and as the anchor is tightened, the wedge expands against the sides of the hole.

To remove a wedge anchor, one can simply unthread the anchor from the hole. The ability to take out the anchor without damaging the surrounding concrete makes it more favorable for applications where removal may be necessary, compared to other types of anchors that may require breaking the concrete or could leave significant damage when pulled out.

Each of the other anchor types, while they may have their applicability for different scenarios, do not offer the same level of ease in removal. For instance, toggle bolts are typically used in hollow walls and would not provide the needed strength in solid concrete. Concrete screws require a specific installation process involving drilling a pilot hole, but they may not be as easy to remove without potentially damaging the concrete. Expansion anchors are designed to grip tightly and are great for long-term installations, but pulling them out can require more effort and may risk breaking the concrete.