High quality support pads (150 mm) with 75 holes, allowing for more volume and speed of air which ensures better dust removal from the work surface and the air. Both the sanded surface and the sanding material itself are continuously cooled. The pads provide better contact with the substrate and prevent sanding of sides and edges. To be used with both the Economic Velcro Discs as the Premium Velcro Discs. The pads are available in two versions: Soft & Medium.