Unlike negligence claims, which focus on the manufacturer's conduct, or strict liability claims, which focus on the condition of the product, warranty claims focus on how these issues relate to a commercial transaction. Warranty claims commonly require privity between the injured party and the manufacturer or seller. Breach of warranty based product liability claims usually focus on one of three types: (1) breach of an express warranty, (2) breach of an implied warranty of merchantability, and (3) breach of an implied warranty of fitness for a particular purpose. Additionally, claims involving real estate may also take the form of an implied warranty of habitability. Express warranty claims focus on express statements by the manufacturer or the seller concerning the product (e.g., "This chainsaw is useful to cut turkeys"). The various implied warranties cover those expectations common to all products (e.g., that a tool is not unreasonably dangerous when used for its proper purpose), unless specifically disclaimed by the manufacturer or the seller.