Festool Sanding Pads come in a choice of ultra-soft, soft or hard versions for sanding flat surfaces, contours and profiles. This backing pad features a multi-jet design for increased airflow and more efficient dust extraction. Festool Sanding Pads ST-STF are part of Festool's line for high performance sanding.For high efficiency dust extraction, the Festool Sanding Pad features a multi-jet stream design that can capture up to 99% of dust. These pads have a 9-hole design that aids in the consistent extraction of dust particles. Efficient dust extraction allows the disc and pad to run cooler, which helps with loading of the abrasive. The ultra soft pad is ideal for rounded contours and chambers; it has an elastic structure with a hardness grade of SW. The soft pad offers high temperature durability with high edge solidarity for tough applications and universal use; it has a hardness grade of W-HT. The hard pad offers high temperature durability with high edge solidarity for flat surfaces; it has a hardness grade of H-HT. Whichever hardness level you need, these pads deliver truer running performance for smoother surfaces, less vibration and longer life. All versions have an M8 connecting thread. Use Festool Sanding Pads with the following tools models: ETS EC and LEX 3.