.203 ID, .274 OD.  5 GN 

- Full containment of the nock post, to completely eliminate any movement of the nock over time due to normal wear and tear and/or impact.

- Inside diameter chamfer that allows the shoulder of the nock to be contained.

- Squared face instead of taper to increase deflection upon impact from the rear.

- Completely eliminates the possibility for the nock to move in any direction, eliminating POI (Point of Impact) variances caused by nock movement.