2 Cutting out complex shapes in sheetmetal is challenging. Luckily some specialty tools are available to help us out! Read more for details on sheetmetal nibblers, how they work, and full write-up with pictures of how to use them! Tools of the Trade: Sheetmetal NibblersJanuary 6, 2019 in FABRICATION KNOWLEDGE / FABRICATION PROJECTS / TOOLS OF THE TRADE! tagged Aluminum / DIY / drill / Nibbler / Sheetmetal / Sign / Tig Welding by Paul