One of the simplest kinds of combination lock, is seen in simple bicycle locks,
uses several rotating discs that have notches into them.
The lock is secured with a pin with several teeth on it which hook into the rotating discs.
with the teeth on the pin When the notches in the discs align, the lock can be opened.
This type of lock is considered to be one of the least secure of combination lock.
. Opening one in this fashion depends on slight irregularities in the machining of the parts.
Unless the lock is aligned precisely, when the pin is pulled outward, one of the teeth will pull more strongly
than the others on its disc. This disc is then rotated to a slight click is heard,
telling us that the tooth has settled . The procedure is repeated for the remaining discs,
resulting in an opening lock, and a correct combination, in very little time.
Combination locks found on padlocks and may use a single dial which interacts with several parallel discs .
Customarily,

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