Originally named Allen Manufacturing Company, the business produced hexagonal set screws and wrenches to fasten them.

An advertisement for Allen safety screws would appear in the 1910 Annual Convention of International Association of Factory Inspectors.

With this, Apex Communications Director Kelly Rhoads confirmed the line would cease production on March 31.

This ended production of the Allen brand in hex keys, L-key, and T-handle styles.

[10] As of 2021, the Apex Tool Group website's Allen page has been purged of all content except for the rebranded Allen logo, the Armstrong logo erroneously referred to as the brand image, and the brand site URL, now a redirect to Crescent.