What is another word for toggle bolt?
Pronunciation: [tˈɒɡə͡l bˈə͡ʊlt] (IPA) 
A toggle bolt, also known as a toggle anchor or butterfly anchor, is a type of fastener used to secure heavy objects to drywall, plaster, or other hollow materials. There are several synonyms for this type of bolt, including toggle screw, wall anchor, hollow wall anchor, and spring toggle bolt. These terms all refer to the same basic design, which consists of a screw with a collapsible toggle or sleeve that expands behind the wall after insertion to provide a secure hold. Toggle bolts are commonly used for hanging shelves, mirrors, artwork, and other fixtures in drywall or other hollow surfaces.
