The favorite choice for serious bowhunters looking for deep-penetrating big game performance. New Axis Carbon arrows are the first ever to utilize carbon nanotubes for increased strength compared to ordinary carbon arrows. Hidden Insert Technology aligns broadheads for tighter groups. Straightness: +/- .003". Weight tolerance: +/- 2 grains. Black, micro-smooth finish with Factory Crest. High-strength nanotubes infused carbon-composite fibers. Direct Fit X Nock - Included/Installed. IT Insert, chamfer stone, installation tool, HIT epoxy - Included/Not Installed.