Though I did not get mine from Penguin, I did get this set included with Leo's Stainless Steel Mini
Chop Cup from another site. I am very impressed overall. Not only are they perfect with Leo's cup, I
used them with a mini Don Alan style chop cup that all other chop balls (except the re-postional
ones from RNT2) had a tendency to bounce back up and stick again when I didn't want them to. The
monkey fist balls do not have the bounce back issue. They work very nice and also do not roll away
as much as a ball might during a performance.