Gweemo's Lobemaster was the most popular brand of ear-hair trimmers sold in the Ferengi Alliance. Known as "The Hair-Trimmer for Distinguished Ferengi," the Lobemaster was initially a failure, and nearly brought company founder Gweemo to bankruptcy. The company's fortunes turned around when Gweemo's nephew, Squim, came up with a new slogan: "Keep Your Ears Open. Use Gweem's Lobemaster." This became the most successful advertising campaign in Ferengi history, and was later immortalized when Grand Nagus Drik made "Keep your ears open" the seventh Rule of Acquisition.

Gweemo's Lobemasters were given away free, but its replacement blades sold for eighteen strips of latinum, a business model which made the company highly financially successful. (DS9 reference: Legends of the Ferengi)

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