Delta Electrical Specialty Company (DESCO), incorporated in 1956, originally manufactured and sold a continuity/voltage tester called the Circuitracer. In 1979 the parent company of Desco Industries Inc. (DII) was established. The same basic design used for the original Circuitracer is still manufactured today and is offered through the Menda brand. Desco is the flagship brand that has been supplying top quality ESD control products to the electronics market for 25 years.