Abstract: In an installation method according to the invention, one pulls the wings of a toggle bolt into contact with the inner surface of a wall continuously during tightening of the bolt, this being in contrast with previous practice where the finger nails eventually must be removed, and thus the pulling action eliminated, in order to prevent locking of the fingernails between the wall and bolt head. An apparatus according to the invention comprises means for exerting a pull on the bolt of a toggle bolt, for maintaining the contact of the wings with the inner surface of a wall until the bolt has been tightened. The invention also provides a special manufacturing method for a particular apparatus of the invention.