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1-800-727-5477 • www.sargentlock.com
Construction Master Keying (21- Option)
Signature
®
Series
90105:D: 11/15/11 Copyright © 2007, 2009 - 2011, Sargent Manufacturing Company, an ASSA ABLOY Group company. All rights reserved.
Reproduction in whole or in part without the express written permission of Sargent Manufacturing Company is prohibited.
With construction key in cylinder
To void construction key using the day/change key
With construction key in cylinder
Construction key rotating cylinder plug
The SARGENT Signature Cylinder employs what is known in the industry as the “Lost Ball” method of
Construction Master Keying. Use the 21- as the option when ordering this feature.
NOTE: Adding this feature to an existing SARGENT Master Key system may not be possible. Contact
SARGENT key records department if this feature is required in an existing system.
The SARGENT Signature Cylinder with “Lost Ball” method of Construction Master Keying is not
offered with 10-UL- and 10-63-. The 64- option is offered for construction keying when 10-6300
permanent cores are to be used.
Example shows “Lost Ball” construction
feature in last chamber of cylinder.
Construction feature can be used in any
chamber.
Change key inserted in cylinder.
Change key rotating. Construction balls fall into
hole in the side of plug.
Change key rotated to position for extraction.
Construction key now voided from cylinder.
Construction key inserted after balls are
trapped. Driver now extends into plug chamber.
Construction key will not rotate.
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