I bought one of this Dremel EZ Lock connectors and a set of carbon disks and I have had the center of those disk fail on me at least a half a dozen times. Do they quality control check these things?
I got the multi accessory kit that included the EZ lock and I have had no issues with them. Used the metal cut off wheel to cut an exhaust pipe on my motorcycle when I didn't have my compressor hooked up. It got used up quickly, but cut very well.
I've had excellent results using mine.I have sliced lots of small metal project pieces.,never had a single problem yet.
I have the 10 point-something volt cordless,and that works so nice.I wish they could invent an easier to change drum sanding bands,though.