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2. Rekeying - Wikipedia

   en.wikipedia.org/wiki/Rekeying

   Rekeying was first invented in 1836 by Solomon Andrews, a New Jersey locksmith. His lock had adjustable tumblers and keys, allowing the owner to rekey it at any time. Later in the 1850s, inventors Andrews and Newell patented removable tumblers which could be taken apart and scrambled.

3. Over-the-air rekeying - Wikipedia

   en.wikipedia.org/wiki/Over-the-Air_Rekeying

   Over-the-air rekeying ... Due to the efficiency and vast cost ... Telecommunications protected by encryption require proprietary or classified keys to lock and unlock ...

4. Master keying - Wikipedia

   en.wikipedia.org/wiki/Master_keying

   For example, master keyed pin tumbler locks often have two shear points at each pin position, one for the change key and one for the master key. A far more secure (and more expensive) system has two cylinders in each lock, one for the change key and one for the master key. Master keyed lock systems generally reduce overall security. [2]

5. Pin tumbler lock - Wikipedia

   en.wikipedia.org/wiki/Pin_tumbler_lock

   These are commonly found on uPVC doors and commercial buildings where re-keying doors is common. Commonly pin tumbler locks are found in a cylinder that can be easily unscrewed by a locksmith to facilitate rekeying. The first main advantage to a cylinder lock, also known as a profile cylinder lock or euro, is that the cylinder can be changed ...

6. Locksmithing - Wikipedia

   en.wikipedia.org/wiki/Locksmithing

   Harry Soref founded the Master Lock Company in 1921 and patented an improved padlock in 1924 with a patent lock casing constructed out of laminated steel. Linus Yale Sr. invented a pin tumbler lock in 1848. Linus Yale Jr. improved upon his father's lock in 1861, using a smaller, flat key with serrated edges that is the basis of modern pin ...

7. Mortgage rate lock: What it is and when you should use one - AOL

   www.aol.com/finance/mortgage-rate-lock-one...

   The sweet spot is the optimal combination of the interest rate, term and costs. Most lenders won’t lock your rate for less than 30 days unless you’re ready to close, and often offer the same ...