INTRODUCING the Hilti PR 2-HS robust rotating laser for horizontal applications - YouTube
Hilti PR 2-HS 33 ft. Rotating Red Laser with Receiver, Receiver Holder and Case (Batteries Not Included) 2131537 - The Home Depot
Hilti - The #Hilti PR 2-HS Rotating Laser for horizontal levelling of concrete, transferring and checking heights, and other excavation applications. Its one button, one function design makes it easy to use,