These coins were minted by a now defunct Canadian company in the years 1983 & 1984 and as far as we can tell, they were never placed into circulation as they can not be found anywhere else on the web. They are roughly the size and thickness of a US half dollar. These particular markers are not magentic. If you are a fan, you may want to collect a few of these unique coins.
These are not new and have aged over the 30+ years even though they were in a protective plastic coin holder. They have been cleaned but may show age signs and being sold as is.