New type of power tool maybe?

[Sinkhole]

I am puzzled by an apparently new type of power tool we are selling at our local hardware. They were selling the discs for it on special the other weekend.
I was hoping some of a more technical nature may be able to explain what such a tool could be used for:
<a href="http://s198.photobucket.com/albums/aa286/sinkhole777/General/?action=view&current=IMAGE_049.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa286/sinkhole777/General/IMAGE_049.jpg" border="0" alt="WhatThe???"></a>

Any Ideas?

[Sinkhole]

Lowest prices are just the beginning indeed!

[lacroupade]

Perhaps a bit of 'bump 'n grind' is in order..:augie

[patbhoy]

I've heard they are sh1t:doh