disc tumbler lock

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cylindrical lock

cylindrical lock
A bored lock which has a cylindrical case into which a separate latchbolt case fits.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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The DualAxess disc tumbler lock plug is used to override the combination and to change combination codes.
Procedures for picking all common varieties of pin, single sided disc tumbler, and double sided disc tumbler locks are described in plain language.
* Disc tumbler locks are medium-priced locks offering minimal security and many key changes.