The True Comp 4.0 Constrictor Grip Attack shaft uses a flex level of 6 to build an elite carbon composite attack handle. True was able to build this awesome shaft using their Constrictor Grip technology which gives you an unreal level of grip due to the raised and texture shaft design. To go along with the awesome grip, it is built with SmartPly which means that the carbon wall is built with up to 25 layers of carbon. These 25 layers make this one of the strongest attack handles on the market.