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Green Beam

Tradesperson in work gloves fitting a Grettz green beam multi-line laser to a wall bracket, with bright green 360-degree laser lines projected across a grey blockwork wall

What Is a Green Beam Multi-Line (4D) Laser Used For?
What a green beam multi-line (4D) laser actually does, the jobs it's built for, and how to decide between a 4D laser, a cross-line laser and a rotary laser.

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