Allstyle offers a standardized drilling service for European style hinges. Drilling must be requested at the time of order. Indicate "Drill" next to each item that needs drilled. Doors with asymmetric rails, arches or cathedrals become handed and will require "RH-Right Hand" or "LH-Left Hand" designation. The handedness is described looking at the face of the door and describes the hinge point.
Our standard drilling setup is pictured. Note that 96mm equals 3-3/4".