It looks like dusty residue from the black finish treatment process.I received my order yesterday, the 2mm socket was filled with dirt. The wheel widners are really nice, so is the hardware. It was odd that the new socket was already packet with dirt though.
The cutting process can leave chips and dust in the hole.
Or that can get in there if the tip sits between machining and finishing and the shop is dusty.
Sorry about that!
If you have a 2mm hex tip (and or a 1.5mm) you should be able to slide it in there to loosen everything then blow the dust out.
We will have to QC those a little better for sure.
Thanks for bringing it to our attention.
"thumbsup"
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