A fastener consisting of a threaded bolt and a hinged spring-loaded toggle; used to fasten objects to hollow walls WordNet 3.0 & Open English WordNet

A toggle bolt, also known as a butterfly anchor, is a fastener for hanging objects on hollow walls such as drywall. Wikipedia

A type of fastener Wikipedia Disambiguation

Type of fastener Wikidata

A fastening device consisting of a bolt and a pair of hinged, usually sprung, wings threaded at the hinge to receive the bolt, used by inserting the bolt with wings folded into a small hole in a sheet material to the point where the wings unfold and the bolt can be tightened. Wiktionary