Schlage Maximum Security Deadbolt Locks With 2 Nickel Silver Keys, Antique Brass Pattern B362NV4609 3 " Screws with steel door reinforcer included Solid metal one-piece design exceeds industry standards against hammer and crowbar attacks Brass key cylinder exceeds industry standards to prevent key cylinder from being knocked out Installation of this unit may in some cases lower insurance rates Universal latch, no adjustment required, pick-resistant lock pins