Disc detainer

=Disc-detainer=

A Disc-detainer (or disc lock, disk lock) is a lock design that uses rotating discs as locking components. In most designs the discs interface with a sidebar when properly rotated to allow them to actuate the locking bolt. Disc-detainers are primarily associated with Abloy locks, but Abus, Kryptonite, and many knock-off brands have begun making them, too. In general, Abloy disc-detainer locks are of unrivaled quality, especially recent designs (Exec, Protec).

History
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Principles of Operation
A key with angled bitting cuts is used to rotate discs. When rotated properly, a sidebar will fall into a gate on the discs allowing the key to turn further and actuate the locking bolt to lock or unlock the lock.

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Vulnerabilities
Disc-detainers are subject to all the same attacks as traditional lock designs, though the tools used are somewhat more expensive. Lockpicking tools for disc-detainer locks closely resemble the 2-in-1 or 3-in-1 picks used with lever locks. The main anti-lockpicking feature of disc-detainers is the use of false gates (or notches), but more advanced designs include a disc locking system that prevents discs from being individually manipulated.

Given the proper tools and skill, all disc-detainer locks are subject to one or more of the following:
 * Lockpicking
 * Impressioning
 * Decoding
 * Bypass
 * Destructive Entry