Just got my new Cobalt's and I noticed small tick marks at each end of each shaft. It looks like someone ground a small 1/16-inch diameter spot through the anodizing. I've never seen these marks on the nock end of an arrow before.
I'm not complaining but I'm curious as to why they're there. Does anyone know?
Thanks

I'm not complaining but I'm curious as to why they're there. Does anyone know?
Thanks