Key Controlled Heavy Duty Mortise Knob Lock – 2-1/2″ Backset - US3 - Polished Brass - Entrance - RH (Bundle) Mortise Lock 11MHz 2B NCF29A1M05 ID4A

11MHz 2B NCF29A1M05 ID4A

but some utilize 7 spaces

Sargent & Greenleaf 4-Wheel and Old Style 8400 Series Change Key

Concealed hardened steel pin for maximum security

Key Controlled Heavy Duty Mortise Knob Lock – 2-1/2″ Backset - US3 - Polished Brass - Entrance - RH (Bundle) Mortise Lock 11MHz 2B NCF29A1M05 ID4ASingle Mortise Entry Knobset Solid Brass Mortise Cylinder Heavy Duty Locking System Pick Resistant Removable #06 Dimple Key Controlled Cylinder Includes 5 Brass Key Controlled Keys & Duplication Card Backset: 2 1 2 Backset Keyed Alike up to 12 KA12 Limited Lifetime Mechanical Warranty Function: Entrance ANSI F08, F10 Latch by knob either side except when outside locked by stop button; then by key outside, knob inside. Deadbolt by key outside, turn