Lock bumping

Lock bumping is a lock picking technique for opening a pin tumbler lock using a specially crafted bump key, rapping key or 999 key.^[1] A bump key must correspond to the target lock in order to function correctly.^[2]

^ Graham Pulford (October 17, 2007). High-Security Mechanical Locks: An Encyclopedic Reference. Butterworth-Heinemann. pp. 76–. ISBN 978-0-08-055586-7.
^ "Consumer Reports Magazine". www.consumerreports.org.

[Pulford2007-1] Graham Pulford (October 17, 2007). High-Security Mechanical Locks: An Encyclopedic Reference. Butterworth-Heinemann. pp. 76–. ISBN 978-0-08-055586-7.

[2] "Consumer Reports Magazine". www.consumerreports.org.

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