ABLOY PROTEC² Cylinder CY501TKey-in-knob cylinder. Abloy PROTEC² lock system. Cylinder CY504TAustralian oval cylinder. Abloy PROTEC² lock system. Cylinder CY505TAustralian oval cylinder. Abloy PROTEC² lock system. Cylinder CY506TAustralian oval cylinder. Abloy PROTEC² lock system. Cylinder CY801TKey-in-knob cylinder. Abloy PROTEC² lock system.