I wasn't able to find a chain for my old McCulloch chain saw at local retailers so I was happy to find these Oregon chains on Amazon.  Oregon provides a good web site for finding the correct chain for your saw.  It's also nice to find something made in the United States.  I'm tired of the poor quality Chinese crap that you find everwhere.  The chain fits perfectly and turned out to cut very agressively.  This is the fastest cutting blade that I've ever had on the saw which I've owned for over 20 years.