Cylindrical locks consist of a lock chassis, a separate latchbolt, operable trim (either levers or knobs), and roses behind the trim. For keyed functions, the cylinder is located within the lever or knob. Conventional cylinders require complete removal of the lock to retrieve the cylinder for re-keying. Specification : 1) 3 Brass Computerized Key, 2) 5 Pin mechanism which have 5 lateral Pins, 3) Specially Designed Big Knob for easy operation, 4) Wide Range of Key Combination, 5) Can be Fitted 25mm to 50mm thick door