Save money on your next home improvement project by purchasing the Atlas Contractor 4 Packs of Polished Brass Tulip Door Passage Locks. This pack of entry locks is perfect to use when you need to simultaneously install or change the locks on multiple hallways or closets at one location. The knobs come with a 2 3/8″ backset that adjusts in length easily to a 2 3/4″ if necessary to fit your door. Complete directions on how to adjust the backset and install the lock are included. All locks are keyed alike and packed 4 to a box.