Evolution of the Screw

Not what you thought? Great interactive resource on screws, from Instructables. Anyone teaching, learning or practicing CAD, Mechanical Engineering or an related field would benefit from this information. I also love that this site allows you to share their content by embedding - much like YouTube and other video sites. It's a brilliant why to grow your audience. I would love to be able to embed part of an online course, so that students could share with their friends - viral curriculum.

When a Phillips is not a Phillips! - More DIY How To Projects