The Segal Brand Vertical Deadbolt is made from a heavy bronze casted housing and keeper. The segal dead bolt has been manufactured since 1912. The unique vertical locking action provides a Jimmy-Proof deadbolt for inswinging doors. The lock includes a solid brass 5-pin cylinder lock, heavy cast keeper, all mounting hardware, and detailed installation instructions. The hardware pack adapts for door thickness from 1" to 2-3/8" (25 to 60 mm).