Hello, Nancy - We're sorry that you had trouble fitting the hole saw onto the drill bit! And we wish we could have been able to connect, so we could have tried to turn this experience around for you. But we appreciate you taking the time to share this experience with us, and we're glad to see that you had no trouble with the return. And if you should give this product another try, we believe the experience will be better. We hope you will! And if you'd like to discuss your experience further, then please feel free to email us anytime at Reviews@RYOBItools.com.