Passage. Round pocket door latch is easy to install. Nothing to mark, nothing to cut. Only requires a screwdriver. Keeps door from warping. deep cups for easy access. Backset 2 3/8", adjustable door thickness 1 3/8" to 1 3/4", strike is 1 1/8" x 2 1/4", square corner. Lifetime mechanical warranty and 10 year finish warranty.