![Duncan Toys 3 Yo-Yo Counterweight Set, Yo-Yo Accessory [3-Pack]](https://m.media-amazon.com/images/I/51OyyF4eLWL._SL500_.jpg "Duncan Toys 3 Yo-Yo Counterweight Set, Yo-Yo Accessory [3-Pack]")
Product Review
From the Manufacturer; MOD Spacers can be installed in most Duncan Hardcore yo-yos changing the shape, profile and response system in minutes. Originally developed for the Pro Z yo-yo, MOD Spacers also fit in yo-yos like Freehand, FH Zero, Bumblebee and more.
