Folders are very useful in the field when needing to make a clean brake line without a brake. We use them regularly when making tough bends where a brake just will not work. Here is a demonstration of one being used. They come in several sizes ranging from 12″ to 24″ and are available at Thompson-Mathis Metal MFG.
Hand Seamers are useful tools for clean bends and closing open hems. Their extended handles provide leverage and pressure with ease. These tools are an essential found in any tin smiths tool bag. Here is a demonstration of one being used to provide a precision bend without bending the entire side on the metal.