The 2015 PIN Nock, in both small and large groove models, features a smooth outer design and the same proven precision groove design that was used to win numerous World and Olympic titles including the Men’s individual gold in London 2012.  The short, high-clearance groove exit enhances finger shooting accuracy, while the small vertical dimension and smooth surface enhances comfort at full draw.  The nock redesign has increased strength to better cope with high-impulse compound bow launch.