Shrinking Hammer by Performance Tool®. For heat-shrinking metal with dolly. Go with this ergonomic and easy-to-use tool to get your four-wheeled friend restored the first time. Designed with functionality in mind, it will surely give you a big help when removing a dent in your vehicle and will make it look new and pristine again. This tool is constructed out of high-grade materials to provide a combination of superior strength, durability, and longevity.