open source project: keychain
existing products
Each web page in this series starts with a review of existing products, followed by an open source specification for the tool set.
open source specification
This is an open source specification for one component in a tool set.
If you are interested in the tool set you mat want to start at tool set overview page.
A keychain (described on its own web page) attaches to a loop on the outside of the case.
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