Here's a little more information about each of the items included in the Griot's Garage THE BOSS G21 Starter Kit. You can click the link to visit the product page for a full description:
Griot's Garage THE BOSS (G21 21MM) - achieve professional polishing results in far less time
Griot's Garage BOSS Perfecting Foam Pad (6.5") - remove light imperfections and enhance clarity
Griot's Garage BOSS Finishing Foam Pad (6.5") - finish the paint down to perfection!
Griot's Garage BOSS Correcting Foam Pad (6.5") - remove light to moderate imperfections with ease
Lake Country Snappy Clean Boost Pad Cleaner - a citrus degreaser designed to help release product and contamination from foam pads