Operator comfort and efficiency of use is ensured by a die-cast alloy and profiled hand grip for strength and lightness. The hand grip is contoured for use by all hand sizes and allows the use of smooth, full strokes. The advanced design of the drive mechanism has a patented catch plate system which, combined with a hardened steel drive rod, prevents notching and scoring of the rod. Quart capacity. Mechanical advantage 12:1. Switchable flow control. Built-in ladder hook. Amazon.com 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. COX is the recognized world leader in quality caulk guns and epoxy applicators. We offer a wide range of manual, pneumatic and battery powered models, all of which are stocked in Haslett, Michigan to ship to any point in Canada or the U.S. All products in the COX line are manufactured in-house at facilities in Haslett, Michigan and Newbury, England. Manufacturing processes adhere to rigid quality management, offering reliability and durability. See more