QUOTE(shinchan99 @ Apr 18 2014, 09:08 AM)
I saw a few supplier most of their locks mechanism are top bottom and side , with some offered at higher premiums will have lock on top side and bottom side as well.
However, from my observation, these lock mechanisms are all inter-connected, means once you turn the key, all the locks (top+bottom+side) will retract to the frame and lock itself. So in other way to look at it, say if a theft with good knowledge on opening the door with pins or whatever device, just by turning the key direction, all the locks will unlock itself. Does it mean that no matter how many locks we buy (be it top bottom side top side bottom side) it will still be the same?
Unless it's like side you have one set of individual key lock, maybe top + bottom another set of individual key lock, the theft will surely have a rough time to open the door aint it?
Anyway just sharing my thoughts here. Not trying to say anything bad about the security door though. Of course we hope there's not much of profesional theft around here.. Coming back to the original question of the durability after going through this whole topic, some pointed out to avoid al-cheapo type, some having experience have to remove the whole security door due to faulty locks etc, it really makes me wonder should i venture into security doors. After some good pointers by supersound and cstkl1 , all we need is just to lubricant the locking mechanism part? Not too tough for a lubricating maintenance job.
You are right on this. A "good" door's locking mechanism shall cover 4 sides. But if people can duplicate the key or have a "master" key, that's it. Also, thief and robber are different. Mine are more on robbing's thinking, so single door in some sense are better than 1.5 or 2 doors.
Always think the other way round, like thinking on bright side, must think on the dark side also