3-head concrete grinder - GIF

3-head concrete grinder.

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Previously:

Concrete vibrator from oscillating tool - GIF
Decorative concrete pillar machine - GIF
Installing precast concrete stairs - GIF
Making pretensioned concrete piles - video
Moving a heavy concrete lid by kicking a pipe under it - GIF

Hope it does not catch her hair. Or ribbons!

Is it made by Norelco

Just demonstrating the tool I guess, I’m guessing it would be used to smooth rough areas?