From YoYoFactory themselves:

Way back when we first started setting world records, redefining contest yo-yos, and the tricks that could be done on them we had an idea. Pads below the surface, to generate spin and response.. on bearing yo-yos.

It was novel, it was cool & it kickstarted the next generation of yo-yo design and play. We still have love for these old pads and the warm response it generates in a yo-yo so we retried our first metal yo-yo shape with these classic pads that we now have again made available to the world. 

The play characteristics are tug response that allows smooth slides on the string. It's a very beginner-friendly setup and is also great for modern responsive play. The lenses add weight but without the caps, it's already a nice solid yo-yo. Lubricant can be added to the bearing for an even snappier response but players familiar with the day will soon rediscover their love for the pads with a dry clean bearing.

Comes complete in box with:

• Yo-Yo
• Pouch
• 2 removable lenses
• 1 pack string
• 2 replacement retro response pads