The Mayhew Tools 4-pc Specialty Hammer Set, No. 32024, includes a concave hammer, smoothing hammer, peen hammer, and U-joint hammer. Each hammer is designed for specific removal applications: The smoothing hammer is used to remove details such as creases or curves on surfaces; the concave hammer rides on the pin when starting, pushing bolts out of corroded locations; the U-joint hammer is for removing u-joints or straightening a tie rod; and the peen hammer is used to shape or work metal. The tools are packaged in a self-contained, reusable storage tray that fits most toolboxes.