Bosch delta sandpaper set hook amp loop perforated 93mm wood bosch 2609256957 the 93mm delta sanding sheet sets from bosch use a hook and loop system and are perforated for dust extraction the set consists of 10 x 60 10 x 120 5 x 180 grit sheets for wood bosch 2609256957 delta sandpaper set hook amp loop perforated 93mm for wood 10pk