C. Measure to confirm that the hole in the door edge is 1″ (25 mm).
D. Measure to confirm that the door is between 1-3/8″ and 1-3/4″ (35 mm and 44 mm) thick.
2. Install the latch and strike
A. Hold the latch in front of the door hole, with the latch face flush against the door edge.
B. Are the latch holes centered in the door hole?