Carpenter ants are large ants known for causing extensive structural damage in homes. These ants create their nests in wood, and thus, pose a great threat. Our kit includes 10 oz. of Evergreen Pyrethrum Dust, a pyrethrin-based dustable insecticide. Use the included Crusader Duster to apply the chemical to where the ants are nesting. The kit also includes two cans of termite and carpenter ant aerosol which may be used for spot and perimeter control. This kit is effective, but yet many times less expensive than the cost of a professional treatment. Save $7 by buying this kit over buying the products separately!