Cylinder backsets available:1-1/2"1-1/8"31/32"Bolts made of 5-ply laminated steel with a hardened roller pin inserted in a case hardened center ply for maximum security. Locks use standard 1-5/32" Mortise Key or Thumbturn Cylinders with AR MS-Type camAvailable Faceplate Options for LS-1000 Long Throw Deadlock: FA-1001 Flat FaceplateFA-1002 Radius FaceplateFA-1003 Weatherstripped Radius FaceplateFA-1004 LH Beveled FaceplateFA-1005 RH Beveled FaceplateDeadlock & Deadlatch Available Options:LS-1000 Long Throw LockLS-2000 Hook Bolt LockLS-3000 Short Throw LockLS-4000 Deadlatch Lock