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Zeekio Backbone Finger Roller Skill Toy- Knuckle Roller
Just put it between your fingers and roll it from finger to finder. The backbone is designed to make it easy to keep a grip while rolling back and forth.
Made of solid brass, the Backbone comes in a gift box with a Backbone sticker.
"Don't be a jelly fish, get a BACKBONE."
3 inches long and weighs 70 grams.