Just in case you break the nock off one of your Easton Genesis arrows, it's a good idea to keep a few extra EasEaston 4mm N Arrow Nock's in your quiver. The N Nock fits all Genesis arrows fitted with Uni bushings. These are press-fit nocks, so there's no glue required. FeaturesFits Genesis shafts with UNI bushingPrecision-molded, press-fitQuantity: 12 PK