These are vintage Sleep Machines (circa 1998) that have been re-machined by Tom Kuhn's factory to accept Dr. Yo's Turbo Discs! Stringplay and performance are enhanced now that these yos don't require a "double loop!"
Quantities are extremely limited. These are no longer in production and are the last batch available for sale. This is the last chance to own the World's First Ball-Bearing Wooden Yo-Yo, it's already a classic!