TenPoints Alpha-Nock features a deep bowstring groove, a large smooth radius base, and elongated ears. The string on TenPoints extremely narrow crossbows wraps tightly around the center of the Alpha-Nock resulting in straight nock travel and precision down-range accuracy, while minimizing string serving wear. The Alpha-Nocks deep groove and large radius base holds the bowstring in place on extremely narrow crossbows to prevent shoot-over or shoot-under.