The PorterCable 390K Orbital Sander

What's the difference between the PorterCable 390 Low Profile Random Orbit Sander and their previous models? Big difference and a big upgrade. As you can see from the photo, the PorterCable 390 has a lower profile design than the previous model. This reduces the sander height by 30% and as a result, you get better handling and control, and less vibration because you are closer to the material. Less vibration, more comfort, less hand and arm fatigue at the end of the day. And I'm all about... 

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