Lock 257

Application
Security lever lock for wood and steel doors.
Preferred installation as additional lock for reinforcing security level.

Operation
Double key turn for bolt action
Right- or left-hand applications
Bolt throw: 1 key turn 18 mm; 2 key turns 36 mm

Options
Keys: 3 double-bit keys; 5 double-bit keys
Front plate plating: Chrome nickel; Satin nickel; Shiny brass

Specifications
Backset: 60 mm
Triple round deadbolts: Ø16 mm
Keyway protective plate hinders drill attacks

Materials
Case: galvanized steel
Mechanism: steel
Bolts: chrome nickel-plated steel
Front plate: see options
Keys: chrome nickel-plated brass