C Series 4L67E BS3621 High security Rim lock. Finish: Polished Brass. Height 74mm, Length 60mm, Bolt Throw 20mm. Backset: 60mm. Door Thickness 38mm to 57mm. Secured by Design approved. UK manufactured. Outer cylinder and lockcase are protected from drill attack by hardened steel plates and pins. Cylinder specially designed to resist torque attack. Particularly suitable for glass panel doors. Distance to barrel 60 mm Case Brasslux Terminer.