Big sanding block with improoved dust extraction and punching tool

Big sanding block with dust extraction. The hole pattern fits to all regualar 80 x 133 mm sanding sheets also from bosch or festool. There are holes to extract the dust and holes to guide air under the sand paper. The rim is an additonial dust extraction feature. It has two purposes. On the one hand dust ist also removed perfectly while sanding over a corner or if the pad isn't on a flat surface. On the other hand it leads to a constant airflow through the system so that you have a constant airf