If you're looking for a caulking gun, the Coral Essentials Caulking Gun would be a good choice with a skeleton gun format and heavy duty metal frame. Because it has an extended frame you'll experience compatibility with 310ml and 400ml cartridges. This assures a reliable and smooth application! Expect a 10.5" (267mm) caulking gun with a nozzle cleaning pin, that is produced with a metal frame. Order this caulking gun now and you'll enjoy a heavy duty metal frame on your next sealing project.