Which tool is primarily used for shaping and finishing the edges of concrete?

The concrete finishing trowel is a crucial tool for shaping and finishing the edges of concrete surfaces. Its flat and smooth surface allows for the application of a final finish to the surface, helping to seal and smooth out imperfections after the concrete has been poured and leveled. The use of this tool is particularly important in achieving a professional appearance, as it helps to eliminate any roughness and ensure that the concrete is evenly balanced and aesthetically pleasing.

While other tools, such as the concrete float, are used for initial leveling and smoothing of the surface, they do not provide the same fine finish as the trowel. The edging tool is also important for properly forming and creating clean edges along the perimeter of the concrete but is more specialized for edge details rather than overall finishing. The spreader is typically used for distributing materials like gravel or concrete and does not play a role in the finishing process. Thus, the concrete finishing trowel is specifically designed for the purpose of enhancing the final appearance and texture of concrete edges.