This is the DeWALT 18V Cordless Caulk Gun. It features heavy duty construction along with 650 pounds of force to help in dispense high viscosity materials like urethane. It uses 10 or 20 oz (300 or 600 ml) sausage packs. Unique to this tool, it has a 360º rotatable barrel along with variable speed control, auto-reverse to reduce dripping, and a handy built in hook for your tool belt. Use DeWALT for all your toughest window adhesive jobs.