Allen Engineering’s riding concrete trowel HDX615 is powered by Power Solutions International (PSI)’s 2.4-liter dual-fuel gasoline and propane engine. The concrete trowel is on display during ...

The trowel goes beyond the limitations of gas and power-cord units, giving concrete contractors the power to pan and finish with unmatched control and no gas headaches. Updated on Aug. 22 ...

An curved arrow pointing right. This hovercraft-like machine is used to smooth over concrete during construction. The HDX780 riding trowel was developed by Allen Engineering and is used for large ...