Centerquic laser centering device for milling machines and drill presses. 1:17 video:
Listed as "Invented by Dan Gelbart". Gelbart discusses this in the video below, queued to start at 2:10:
More: https://www.centerquic.com/
Previously:
Hand-held laser for nuclear decommissioning
200-watt laser bazooka - GIF and video
Laser graffiti remover - GIF
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