https://makezine.com/parts/something-springy-made-of-metal/
Something springy made of metal Archives - Make: DIY Projects and Ideas for Makers
made of metal
https://www.engadget.com/2011-11-05-serious-sam-3-bfe-weapons-are-made-of-metal-so-is-this-trailer.html
Serious Sam 3: BFE weapons are made of metal, so is this trailer
Nov 5, 2011 - If you're anywhere near anything that could become a mosh pit, and you don't want said place to become a mosh pit, we suggest turning down the volume on this...
serious sam 3 bfemade of metal