Typically, keychain multi-tools — especially those shaped like keys — have a handful of functions at best, often three to ...

The MSTR KEY (Master Key) multi-tool is the same size as a common house key, it fits on all the same key rings, and conveniently features 20 tools you might need in a pinch!

From about 2011 to 2013, the Betson Coin-Op Distributing Company sold, marketed, leased and financed about 25 Key Master machines throughout Arizona, according to court documents.