1 Line Gun - DayMark Label Gun and Labels simplify proper product rotation and assist in ensuring food safety. Available in four adhesives and a variety of styles, DM3 Label Gun Labels are designed for a broad spectrum of restaurant applications. DM3 Label Gun Labels are designed to fit the 1 Line Marker DM3 Speedy Mark Express 10. When loaded into the 1 Line Marker, DM3 labels can be printed with one line of information and quickly adhered to a product or package.