YoYoFactory Grind Monster
From YoYo Wiki
The Grind Monster was the second release in the Project Red Alert (aka Redline) series by YoYoFactory. The Grind Monster was the followup to the Grind Machine, and featured a slightly smaller diameter and lens caps attached directly to the aluminum halves. Three hundred yo-yos were produced.
[edit] Photos
In the below photos you'll see that this used yo-yo has one cork pad and one thin dif-pad over the o-ring.
