Designed to withstand the punishment arrows receive from hard indoor target butts used in 20 yard/18 meter competition. Conforms to World Archery 9.3mm outside diameter regulations. Provides the proper spine at the correct weight so archers do not have to add excessive weight to the point for optimum tune. Features Diamond Coat finish for a smoother draw and easier removal from targets. Straightness tolerance of .0025"and weight tolerance of +-1.0 gr. Available in sizes 350 (10.2 GPI), 400 (9.5 GPI), 500 (9.0 GPI), 600 (9.0 GPI), and 700 (8.9 GPI). Includes BullDog nock collars and pin nock adapter. Pin nocks and points sold separately.