The product is a lot of 27 Keuffel Esser Leroy lettering pens, with 19 of them being unopened. These vintage drafting tools are made by the renowned brand KEUFFEL & ESSER in the United States. The set includes two 3237-3 pens, known for their precision and quality in engineering and drafting tasks. This collection would be a valuable addition to any collector's inventory of rare and sought-after drafting tools.