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2. Rekeying - Wikipedia

   en.wikipedia.org/wiki/Rekeying

   A standard pin kit offers the exact size variety needed. Using manufacturer depths permits easy keying, but often you must deviate slightly for optimum accuracy. Pin kits provide master- wafers, top- pins, and springs for a thorough cylinder rebuild. Replace any worn parts, rekey, lubricate, and reassemble.

3. 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]

4. Officer's tool - Wikipedia

   en.wikipedia.org/wiki/Officer's_tool

   An officer’s tool (also known as an A-tool, rex tool, or lock puller) is a forcible entry device used by firefighters and other first responders. Officer’s tools are designed to completely remove cylindrical locks from doors without causing major structural damage, allowing for direct access to the internal locking mechanism.

5. Pin tumbler lock - Wikipedia

   en.wikipedia.org/wiki/Pin_tumbler_lock

   Euro profile locks, an example of a cylinder 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 ...

6. Tubular pin tumbler lock - Wikipedia

   en.wikipedia.org/wiki/Tubular_pin_tumbler_lock

   A tubular lock and key. A tubular pin tumbler lock, also known as a circle pin tumbler lock, radial lock, or the trademark Ace lock popularized by manufacturer Chicago Lock Company since 1933, is a variety of pin tumbler lock in which a number of pins are arranged in a circular pattern, and the corresponding key is tubular or cylindrical in shape.

7. Slim jim (lock pick) - Wikipedia

   en.wikipedia.org/wiki/Slim_jim_(lock_pick)

   A slim jim (more technically known as a lockout tool) is a thin strip of metal (usually spring steel) roughly 60 centimetres (24 in) long and about 2–4 centimetres (0.79–1.57 in) wide originally marketed under that name by HPC Inc., a manufacturer and supplier of specialty locksmithing tools.