The center-tipped diameter 4.2 x 180 drill (1806-4270S) or optional diameter 4.2 x 130 drill (1806-4280S) is held at an oblique angle pointing to the center of the locking hole. Upon X-Ray verification, the drill is placed perpendicular to the nail and drilled through the medial cortex. Confirm in both the A/P and M/L planes by X-Ray that the drill passes through the hole in the nail.
