... ,lock,passage lock ,entrance locks our factory specialize in producin Cylindrical knob lock,door knob,knob door lock ,knob lock ,lock ... duty residential projects. Features Construction:Solid steel chassis and latch case zinc-plated for corrosion resistance.Cylinder and Keys:solid ... .Latch backset: 60mm(2 /3-8) or 70mm (2/3-4)Various finished colour, different colour share with same price Cylindrical ...