Cylindrical Levers are like the usal knobs that you find in our regular home...only difference is that it has a lever instead of a knob. It operates the same way as a knob would. Key to open on the outside and a push button on the inside.
Caution in using the Cylindrical Levers. You would need to advise your contractor to be very precise in setting the backset (ie the distance from the edge of door to the centre of the hole where the lock is supposed to be). Any mistake would cause the lever to droop or lower the life stan of the lock because of the tension caused.
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