The Mechanics M550DB Air Hammer with 4 Chisels will handle all of your general repairs, including cutting and exhaust system work. The Mechanics Air Hammer has a built-in air regulator and a quick-change spring safety retainer. Features: * Air hammer with 4 heat-treated chisels * Built-in air regulator * Quick-change spring safety retainer What"s In the Box: * Mechanics M550DB Air Hammer * Four Chisels