I agree with the issue of toughness. They will break if you hit them and you have to check for splits often. YOU REALLY DON'T WANT TO SHOOT ONE WITH A VERTICAL SPLIT! They will take some rough treatment and are either straight or broken. I shoot the Carbon Express CX which are plus or minus .003 . I shot the Epics by Easton for a couple of years and never found one that was over .004 run out. They are a little fragile but a good option for someone needing a thrifty alternative. Don