Embodiments generally relate to an alignment device to assist in drilling or reaming an opening in a structure. The device comprises: a base element, the base element having at least one first fixation element to allow fixation of the device relative to the structure; a positioning element coupled to the base element, wherein a position of the positioning element relative to the base element is adjustable; an alignment element mounted to the positioning element and rotatable in at least two dimensions to allow precise alignment for a drilling or reaming tool with a drilling or reaming site on the structure; at least one second fixation element to allow fixation of the positioning element relative to the base element; and at least one third fixation element to allow fixation of the alignment element relative to the positioning element.

A hole expansion, forming device includes a cutting portion main, body formed to have a diameter for the cutting portion, main body to be housed within a joint hole and including a cutting blade tool movable in a range from a housed position at which a blade is housed within a diameter for the cutting portion main body to an extended position at which the blade projects out of the diameter, an advancing and retracting member that is constructed to move in an axial direction by an external force and rotate about an axis of the advancing and retracting member, and a link mechanism that converts an advancing and retracting movement of the advancing and retracting member into a rotational movement of the cutting blade tool, a tip portion bearing that is provided on a tip end of the cutting portion main body, and serves as a tip end side bearing when being housed in an inner side of the joint hole.