This thread is discussing two different products as though they were one and the same.

The initial post was addressing the ceramic covered metal slug, where the edges are rounded off.

Then the Chipco Pro-Tech tokens were broght up as though they were the same item. But they are different.

The Chipco Pro-Tech token has no ceramic. As described, it has a metal base that is very light weight and I imagine is somewhat like a brass core slug (but again, using a light weight metal). both sides have a round plastic cover, onto which an image is printed. If you look cloesly, the plastic covers are welded (fused) to the metal core.

Lastly, and keep in mind that I am still new to this hobby, it is the Chipco Pro-Tech token that keeps getting called a "choken", however, that term was originally given to a concept that Harrah's explored whereby a regular composite chip was encased into a metal ring and that assembly was used in a slot machine.

The cover of most TCR's has one of these "chokens" displayed (a Harrah's $5 chip at about the center of the cover). As I understand it, these chokens and the ceramic covered tokens caused a lot of malfunctions in the slot machines.

As far as the Chipco Pro-Tech tokens, I am not sure why they have not worked out.

Jim Follis