I ran this filter for about 9300 miles with Mobil 1 AFE 0w-30 in the Focus in my sig:
After a few seconds of cutting with a HF version of a Dremel, the cutting wheel looked like this:
I switched to a 4.5" angle grinder with a cut-off wheel (rookie move, I know) As a result, any metal shavings in the following pictures (probably) came from the cutter:
After a few seconds of cutting with a HF version of a Dremel, the cutting wheel looked like this:
I switched to a 4.5" angle grinder with a cut-off wheel (rookie move, I know) As a result, any metal shavings in the following pictures (probably) came from the cutter: