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= The Process = Schlage is a huge company, and their locking systems are available anywhere on the planet. The law of large numbers leads to the conclusion that if a large corporation could charge a relatively cheap amount ($15-$50) for a simple door lock, they must have a huge profit and therefore low input costs. To produce millions of locks every day at a cheap price, they'd want to take advantage of antiquated designs and mass production. The tumbler pin design naturally leads to a limited number of configurations. 10 per pin, in fact. Here's an illustration of their types: {|border=1| !Pin Type !Cut depth |- |0 |0.005 |- |1 |0.020 |- |2 |0.035, |- |3 |0.050, |- |4 |0.065, |- |5 |0.080, |- |6 |0.095, |- |7 |0.110, |- |8 |0.125, |- |9 |0.140 |} Additionally, there are 5 standard positions for each of the pins: {|border=1| !Pin Position !Distance from Shoulder |- |0 |0.231 |- |1 |0.387 |- |2 |0.543 |- |3 |0.699 |- |4 |0.855 |} Considering this limited range of variability and the constants elsewhere (key thickness, length, width), it is entirely possible to describe a Schlage 5 Cylinder key within a simple set of rules. In fact, there are only 100000 different keys out there. The key blade length, thickness, width of the flat spot for the pin, shoulder length, etc are all constant. A set of specifications can be derived from these constants and variables to reliably reproduce any key configuration. I assume no responsibility for what you do with this information. This is instead a demonstration of the unreliability and lack of real security that a lock might give for something you really care about. ''Classical tumbler pin locks are not safe from a crafty hacker!''
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