Use the recommended 3/16” drill bit after you’ve marked your knob or pull placement. Some pulls that have stud-bosses will require a 1/4” hole. A stud-boss is an extension of the screw mould that will be counter-sunk into the cabinet door. A 1/4” drill bit will be needed. This will assure the pull sits flat against the cabinet face. Drill a hole completely through the cabinet face.