A backing pad for a power tool having plate-like form and a trapezoid cross-section with a top surface, a larger bottom surface and a slanting circumferential surface connecting the top and bottom surfaces. The backing pad can be connected to a tool shaft of the tool and is adapted for receiving a polishing or sanding material on the bottom surface. The backing pad is provided with a recess and a plurality of holes and channels that creates a predefined air flow between the bottom surface of the backing pad and a working surface. At least one hole ending in an opening is located in an annular outer section of the bottom surface, the annular outer section being located opposite to the slanting circumferential surface of the backing pad. The additional hole is in connection with at least one opening located in the top surface of the backing pad.