Better Home Products Treasure Island Passage Door LeverTreasure Island Passage Door Lever Function: (Passage) Passage style door levers have a functioning latch mechanism but do not lock. They are typically used for closets, interior doors that do not require locks or in entryway sets in combination with a deadbolt. Treasure Island Series BHMA Certification: Grade 3 Function: Passage Backset: Adjustable 2 3 8" or 2 3 4" Cross Bore: 2 1 8" Door Thickness: 1 3 8" to 1 3 4" Handing: Left, Reversible, Right