I've been wondering if 3D printed tools could possibly bend steel. It seemed possible unlikely. I designed and printed several tools which are used on a hydraulic press to bend and form steel sheet metal. This particular tool could be made by CNC machining the tools from metal but 3D printing it is much faster and easier.

These videos usually take a ton of work and a lot of money in tools and materials. I've made a patreon if you're interested in supporting the creation of these projects:   / stuffmadehere  

If you're interested here's some of the tools that I use in this video:
Pneumatic jack conversion for my 20 ton press: https://amzn.to/3ajft6j
Hypertherm powermax 45xp with machine torch: https://amzn.to/2zfoyAv
Small machinist square. Cheap but useful: https://amzn.to/2XK6I2N