This epoxy adhesive tool features a steel carriage and is engineered for high-volume, continuous use. The tool can be easily converted from dispensing a 22 oz. 1:1 ratio cartridge to a 16.5 oz. 2:1 ratio cartridge. This was only used for one day for a seismic retrofit project. It is still in new condition. Manufacturer: Simpson Strong-Tie Model number: EDT22S