Abstract: An apparatus comprises a rectangular frame having horizontal sides with horizontal lengths, vertical sides with vertical lengths, a hollow area between the horizontal and vertical sides, a first facing side, and a second facing side. The first facing side comprising an English measurement scale. The second facing side comprising a Metric measurement scale. Two vertical members are slidably disposed between the horizontal sides within the hollow area. Two drill guides are configured to be removably joined to the vertical members at desired locations. A horizontal guide wing is removably joinable to a one of the horizontal sides. A vertical guide wing is removably joinable to a one of the vertical sides.