hex head screw with rubber washer

One of the main advantages of wall butterfly anchors is their versatility. They can be used to hang a wide range of items, from picture frames to light fixtures. They are also easy to install, requiring just a few simple steps. First, you will need to drill a hole in the wall that is slightly larger than the anchor itself. Then, insert the anchor into the hole and gently tap it into place with a hammer
wall
wall butterfly anchors. Finally, insert the screw into the anchor and tighten it to secure your item to the wall.

...

The M12 in the term refers to the metric screw thread size, which measures 12 millimeters in diameter. This size is commonly used for medium to heavy-duty applications where robust anchoring is crucial. Chemical anchors, unlike mechanical anchors, rely on a chemical adhesive to create a strong bond between the anchor and the substrate. They offer advantages like high load-bearing capacity, resistance to dynamic loads, and minimal impact on the surrounding material.

...