"A Silver color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Per fess dancetté of four Argent and Gules in base a bayonet fesswise of the first, a chief tierced per fess of the like, the second and Azure. Attached below the shield is a Silver scroll inscribed "FIRST IN LAST OUT" in Red letters."
Symbolism: "Red and white are the colors for the Corps of Engineers. The four red points represent the battle honors awarded the unit for service during World War II; they also represent the teeth of a saw, an item of Engineer equipment, which is used with the bayonet to indicate the engineering-combat function of the Battalion. The three stripes at the top simulate the stripes in the Flag of the Territory of Hawaii, where the organization was activated. They also allude to the Meritorious Unit, Philippine Presidential and Korean Republic Presidential citations awarded the Battalion; the blue stripe symbolizes service in Korea."