Bohning’s Classic Nock is the #1 choice for traditional archers and is perfect for wood, fiberglass, and swedged aluminum arrows. The Classic Nock features a raised index and is available in 5/16″ and 11/32″ sizes. The average weight of the 5/16″ is 10 grains, and the average weight of the 11/32″ is 13 grains. The Classic Nock’s tapered .115″ (2.92mm) throat provides the ideal soft snap onto traditional bowstrings.