When Easton introduced the X10 as the ultimate projectile for the recurve bow, compound shooters were quick to recognize and adapt the benefits of these archery arrows advanced design. Optimized specifically for the compound bow, the NEW X10 ProTour combines a stiffer tail spine and front taper. The result is stiffness where it's needed and a low-profile for ultimate accuracy at long-range outdoor distances. Straightness: +/- .0015" Guaranteed max. Extra high-strength carbon fiber bonded to a 7075 alloy core tube. Weight tolerance: +/- 0.5 grains. Polished black carbon finish.