Astra Dot 50mm Sanding Kit                                  Also available in 75mm Kit $180.00

Comes complete with 

Hand sander with 50mm mandrel

10 discs in each of 60, 80, 100, 120, 150, 180, 240, 320, 400, 600, 800, 1000  

120 discs in total
Plastic carry case

It is a simple sanding tool that is used to sand woodturned objects on the lathe while the work is spinning.  I use mine to sand bowls and platters and also some spindle work such as Pepper/Salt grinders.

I have found this tool to be the best way to sand.  It does the job quickly and effectively by eliminating the obvious concentric marks made by hand sanding.