Orbital sander series bosch pss power 250 watt weight 16 kg dust extraction power supply mains operation max leerlaufschwingzahl 24 000 in umin min leerlaufschwingzahl 14 000 umin function grinding features soft handle velcro fix system operating voltage 230 v tool holder velcro fastening schwingkreis 2 in mm sanding surface 92 x 182 mm included in delivery carry case setting wheel for orbital stroke rate preselection sanding sheet with velcro t