Abstract: A one-piece tool that is a jig for drilling pilot holes in deck boards by self-aligning along two axis on a planar surface in the form of a relative offset from the deck board and joist resulting in one point using the deck board and joist as a reference guide. The self-alignment feature replicates the position of the pilot holes for fasteners that are accurately on the centerline of joist and uniformly spaced and flush with deck board. Deck fasteners remain centered in the joist assuring optimal structural strength. The tool can be aligned to the right or left of the joist as needed with the same results. The tool may be used with various decking materials including but not exclusive to wood or composite decking The tool replicates the drilling pattern with accuracy and precision resulting in an extremely aesthetic appearance and optimal strength of the finished deck.