This kit is great if you already have a media separator (if not check out the Deluxe Kit).  Use a universal decapping die and this will clean the primer pockets and make them look like new. 

-Cleans 2-4 lbs. of brass.

-High Speed Tumbler cleans cases in about 3-4 hours max

-Media won't rust or wear out

The media size is .047"x.255".  This will work for all caliber sizes and it will clean the primer pockets the best.