This Kit is designed to help you replace any parts you may have lost for your Duncan Hard Core ball-bearing yo-yos, or for you to upgrade or change your yo-yo's performance.
This kit includes 5 sets of spacers of variable widths for different gap settings, one ball bearing, and two rubber O-Rings. parts work with the following yo-yos:
Avenger, Ballistic, BumbleBee, Dragonfly, Freehand, Freehand Zero, Freehand Metal, Feehand MG, Throwmonkey, Flying Panda, Cold Fusion, Mosquito, Speed Beetle and most other Duncan yo-yos.