Bohning's Legend Nock was designed by Archery Hall-of-Famer and U.S. Olympic Coach Al Henderson. The Legend Nock is great for wood, fiberglass, and swedged aluminum arrows and is available in 9/32" and 5/16" sizes. The average weight of the 9/32" is 8 grains, and the average weight of the 5/16" is 11 grains. The Legend Nock's throat size is .105" (2.67mm). Proudly manufactured at the Bohning Factory in Lake City, Michigan, United States.