This video shows how to operate and maintain the 36” Variable Speed Electric Power Trowel, but the same information applies to all Variable Electric Trowels. EDCO Power Trowels are designed to create smooth finishes to concrete slabs. Their spinning blades smooth wet concrete and create even surfaces. Electric Power Trowels can come in full, reduced, and variable speeds. ‘Variable Speed’ means that the speed of the spinning blades can be adjusted depending on worksite need.