The Ravin .003 R500 series arrows are engineered to complement the high-speed capabilities and superior performance of the Ravin R500 series crossbows. Crafted for the discerning hunter, these arrows are built to endure the immense kinetic energy produced by R500 bows. They ensure a reliable and precise flight path, consistently hitting the target with accuracy. For exclusive use with Ravin R500 series crossbows only Six-Pack 400 grain (excluding 100 grain field tip) Constructed entirely from pure carbon Brass threaded inserts with high-impact 2 inches high-profile offset Vanes Durable aluminum nock bushings Polymer nocks designed by Ravin