Chosen Solution

My saw didn’t have any problems before I changed the blade, but now the attachment won’t spin at all. I don’t know what I could’ve done to break it, help!

Try taking the blade off and attaching it again. If it still doesn’t work you might have a faulty attachment. Also, do you at least hear the motor spinning inside? If not, than it might be a more serious problem and you might need to replace the motor itself. Be sure to check out the troubleshooting page for the RotoZip rebel first. Here’s the link RotoZip Rebel REB01 Type 2 Troubleshooting

You did release the lock I assume after changing the tool bit?