The nock collars are a great add to my arrows. They will not fit over a shaft with a wrap installed. You could install them and then wrap the shaft, or trim wrap slightly to accomodate the collar. The weight is 5 grains per collar. I used epoxy to install mine, because they don't have a super snug fit to the shaft if you just press them on without adhesive. I also purchased collars for the point end of my stump shooting arrows and use a hex small game head super tough and really helps durability on the business end of my arrows. Hope the info helps.
Answered on 4/24/2013 by Anonymous