These are anodizing errors, typically one piece of the 3 for total assembly will have some small form of dots that are not really noticeable until looking close.
Cad designed and tested to be of Atomic Quality. Guaranteed not to break free or loosen up. Anodized in your choice of colors for that customized look.
Black, Blue, Brown, Flo Pink, Flo Yellow, Green, Lime, Orange, Purple, Red