I just recieved the suggestion that I give you the type of cutting wheel that I have found to work better then Dremals. A company called Gyros makes a very good fiber blade that cuts well without breaking. Dremal brand blades tend to break. You could go through a dozen Dremal brand blades before wearing out a Gyros blade. Especially if you buy their heavy duty arbor. The actual surface of the arbor is larger thus less chance of the blade snagging a bit and the blade shattering. I was just putting away my tools and caught the model number of the blades. I am currently using #11-32250. Don't know the # for the arbor. On the back of the card it says they have a web site www.gyrostools,com . Hope this helps.