I own several sets because they are the finest I've seen since Mike Rogers' were available. White balls are ideal for visibility and can be seen from across the room very easily. They also perfectly match the Leo Smetsers' congruent, final load baseballs. Magic from a professional for professionals and comes very highly recommended.

I have to say I had the same problem as #1 balls would hang up in chop cup ,you didn't know if the ball had dropped or not. These balls have the heft to drop every time .

I knew when I received these that they were the answer to my prayers. They are quite heavy, and as a result it only takes a light tap of the cup to perform the routine. In the past I always had to smack the cup down fairly hard (as I see other performers having to do) and was never comfortable doing so.

Those worries are gone.

These balls are fantastic!!!

Thanks, Leo!

The non chop cup versions I ordered are fantasic and the weight is very nice but the ones for the chop cup have a noticible round cylindrical bulge in each side that keeps them from bearing a close inspection. This may not be noticible in colors other than white and at performance speed they are fine. Visually I would expect the balls to look normal sitting still from 3 feet away. These do not when the light is right.

Well made but the magnet is way too weak.

These are very well made, but the "device" is a bit weak. I sort of collect chop cups (and cups and balls). C'mon, we all know you all do....

Anyway, they would not work properly with most of my chop cups and and I was preparing to return them. then I found a leather/unfolding one I use when traveling, and they work perfectly.

Just be careful. AFTER I bought it, Penguin told me they really only work with Leo Smesters chop cups. Really. They could have put that on the product description, either as warning or suggestion.

These are very well made, and very nice looking BUT the magnet is not strong enough. I do not have a Leo Smetsers Chop cup, but have at least six others, and it did not work with any of them.

I also tried to attach the ball to a refrigerator, but the magnet was not strong enough; the ball just rolled off.

SO, just make sure your chop cup has strong magnet(s), or you will be returning it like I am.

Too weak of a magnet - huge disappointment for me. I must return them for they are useless! The 2 magnets are not extremely well hidden either.

I use the Bar Cup Reloaded by Roger Nicot and this magnetic ball will not even begin to stick to this cup. It will stick to the outside but not at all to the inside. These balls look great but they don't work at all.