Weighing 400-grains, the Match 400 Carbon Crossbow arrow features a Stainless-Steel Insert which creates an improved 14% FOC, generating up to 20% tighter groupings than previous carbon arrows. Each Match 400 carbon crossbow arrow is inspected for straightness to within .004 . The arrow is equipped with TenPoint s Alpha-Nock HP. TenPoint s Alpha-Nock features a deep bowstring groove, a large smooth radius base, and elongated ears. The string on TenPoint s crossbows wraps tightly around the center of the Alpha-Nock to yield straight nock travel and precision down-range accuracy, while minimizing string serving wear. The Alpha-Nock s deep groove holds the bowstring in place on extremely narrow crossbows to prevent shoot-over or shoot-under . The 20-inch carbon shaft is fletched slightly offset and is fitted with a 61-grain aluminum insert and 3.5 Bohning X Vanes.