dynorbital supreme random orbital sander - unique rotor utilises 5 blades and produces more useable power - the air motor is suspended by vibration-absorbing rubber rings to minimize vibration - triple-sealed balancer bea......dynorbital supreme random orbital sander - unique rotor utilises 5 blades and produces more useable power - the air motor is suspended by vibration-absorbing rubber rings to minimize vibration - triple-sealed balancer bearing - anti-clog vacuum design - different vacuum style: non-vacuum, central vacuum-ready or self-generated vacuum-ready - different pad diametres: 89 mm (3-1/2"), 127 mm (5") or 152 mm (6")