The term TYPE OF BOLT can refer to a toggle bolt, which is a type of fastener used to secure objects to hollow walls. Toggle bolts are made up of two parts: a machine screw and a spring wing toggle. The toggle is inserted into a pre-drilled hole in the wall, and then the machine screw is tightened to secure the object to the wall. Toggle bolts are often used when traditional screws cannot be used due to the thickness of the wall.