Abstract: The invention provides a bolt apparatus for fixation of bones, the bolt apparatus comprising an expandable section having respective ends, the expandable section being operable between a contracted position and an expanded position; and expanding means in operable association with the expandable section, to displace the expandable section between the contracted position and the expanded position by simultaneously applying force to the respective ends of the expandable section, such that each of the respective ends of the expandable section are advanced toward the opposing respective end. The invention also provides a method for fixation of bones. The method comprises the steps of reducing the fracture; providing a channel across the fracture; inserting a bolt apparatus of the invention; and fixing the bolt apparatus in the channel. Preferably, the method also comprises providing a plate in operative association with the bolt.