Some people glue their nocks in to the point you can't turn them? You can index as described, but I always want to have the ability to turn my nocks a little anytime I want. I land the cock fletch where I want it on the shaft and then turn the nocks to align precisely where I want after I am done. I can usually turn the arrow within the nock without clicking the index. I want my nocks pretty firm in the arrow but not really tight or fixed.