The Cox North American jumbo quart mechanical caulk gun provides approximately double the life of other caulk guns. Made with a die-cast zinc alloy body, it features a mechanical advantage of 12:1, a wear compensating device, a built-in ladder hook, a sintered steel catch plate, and a thumb-activated instant pressure release. All the components are replaceable for easy repair. The caulk gun uses a standard 29-ounce cartridge and comes with a 1-year limited warranty.