American Locker (ALGI) 10-K 2006 FY Annual report

QuickLinks -- Click here to rapidly navigate through this document

Exhibit 21.1

List of Subsidiaries

        The following companies are subsidiaries of the Company and are included in the consolidated financial statements of the Company:

NAME	Jurisdiction of Organization	Percentage of Voting Securities Owned
American Locker Security Systems, Inc.	Delaware	100	%
American Locker Company, Inc.	Delaware	100	%
American Locker Company of Canada, Ltd.	Dominion of Canada	100	%(1)
Canadian Locker Company, Ltd.	Dominion of Canada	100	%(2)
Security Manufacturing Corporation	Delaware	100	%
ALTRECO, Incorporated	Delaware	100	%

(1)

Owned by American Locker Security Systems, Inc.

(2)

Owned by American Locker Company of Canada, Ltd.

QuickLinks

Exhibit 21.1