Heating a screw to prevent wood splitting.
<video controls autoplay loop style="max-width: 100%;">
<source src="https://diqn32j8nouaz.cloudfront.net/tooltalk_17657881241719.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
How screws are made - video
Machining a tiny screw - video
Screws - The Early Years - video
Shear screw - photo

