This product line is defective. Before buying I read some reviews and noticed some were saying the discs were losing its cutting edge on the first cuts. I though those people were using the disc in a wrong way. However, once I tried them I suffered the same issue, after exactly 1 cut of 10 seconds the disc had lost its cutting surface.
This gotta be a defective batch as its inconceivable that a quality brand like Diablo would do a product that won't work for more than a single cut.
I emailed Diablo tools for warranty, I'm expecting them to honor it.
For now, DO NOT BUY, these discs are defective and don't work.
The photos show the proof, I decided not to try the second disc and I'm showing a Lenox blade with 300+ cuts that has its cutting surface intact.