Oh I get you now its like the center is up a bit and allows the chip to spin in place in the stack! I feel like all the chips have issues. Clay will just chip and get flea bites in them. the composites are the same. The ABS ones will have defects in them because they are mold injected..
Plus once you do find one, finding a design you like and one that has 25c chips lol.
I like this sets design, simple, numbers are visible and legible, they have 25c chips denom.. but is the slipperiness an issue haha.., I think grabing a sample pack and feel them to make sure they are okay.. It's really great feedback trigs!!