Originally Posted by porter
The effects are amazing. Booty Shakers do the same thing but they're an add-on, not a replacement. I think the Pearls are cheaper but they are designed for 10.5mm legs (they fit on 12.7mm but they're an absolute demon to put on, take it from me).
GRETSCH uses a variant (probably made by GIBRALTAR), fits 12.7mm- 'chambered rubber floor feet' is what GRETSCH calls em'.