The Vintage Craftsman Autobody Bumping Hammer is a durable hand tool designed for automotive use. Made with steel, this unique hammer features both round and square headed options, making it versatile for various tasks. The model number 4551 signifies the specific design and quality craftsmanship that Craftsman is known for. With no warranty included, this tool is a reliable choice for professionals and DIY enthusiasts alike in the automotive industry.