Backset adjuster for a door lockset jig

A cutting guide apparatus for guiding placement of bore holes in a door, the apparatus comprising:

• an engagement interface configured to retain the apparatus proximate to an edge of a door and center an edge bore guide between an inside face and an outside face of the door, the engagement interface comprising a first arm and a second arm that are each operably coupled to a common pivot axis;
• and
• a backset assembly that is operably coupled to the engagement interface to enable an amount of backset from the edge of the door to a center of a handle hole guide to be adjusted,
• wherein the backset assembly comprises a first mounting bracket operably coupled to a first portion of the first arm and a first portion of the second arm, the first mounting bracket being disposed along one of the inside face or the outside face,
• wherein the backset assembly comprises a second mounting bracket operably coupled to a second portion of the first arm, the second mounting bracket being disposed along the other of the outside face or the inside face,
• wherein the edge bore guide comprises an edge bore collar that defines the common pivot axis, the edge bore collar defining a guide for a boring tool to cut or bore a hole in the edge of the door,
• wherein the first portion of the first arm comprises a first pivotal link receiver configured to rotatably retain a first pivotal link,
• wherein the first portion of the second arm comprises a second pivotal link receiver configured to rotatably retain a second pivotal link, and
• wherein a threaded rod is operably coupled to each of the first and second pivotal links to draw the first and second pivotal links toward each other responsive to rotation of the threaded rod in a first direction and urge the first and second pivotal links apart responsive to rotation of the threaded rod in a second direction.