Essentially a plastic, fixed metal axle Duncan Butterfly model with mag-style side caps.
Duncan fixed, metal axle Wheel yo-yo with mag-style side caps and Speed Racer branding. This yo-yo came out in 2008, but Duncan's 2008 toy catalog makes no mention of this obscure yo-yo series.
Covered by US patent 5769686 for a "Yo-yo having an improved axle and insert retainer".
