Pin nock from Victory . Key features: Designed for use with any arrow using a standard pin nock system. Simple push on fit. Used in combination with a pin provides added protection for the shaft from nock end impact. Index and alignment feature for perfect nock rotation. Available in a range of colours to fit your style. Technical specifications: Type: Pin nock. Size: Standard pin nock size. Groove Size: Weight: 3 grains Compatibility: All Standard Pin bushings.