For use with 1/10 gallon cartridges. Perfectly balanced for maximum performance, this gun is ideal for the professional. The Stop Flow feature stops caulk from flowing or dripping. Patent feature ensures longer life by preventing the plunger from pushing beyond the front cowling. It has a built-in spout cutter and a nozzle clean-out tool under the barrel. It comes with a D-ring, wrist strap and a ladder hook.