Reduced diameter shaft designed for durability and accuracy in wind and other inclement weather. Straightness tolerance of +-.0025” and weight tolerance of +- 0.5 grains. Available in sizes 500 (7.6 GPI), 400 (9.5 GPI), 340 (9.9 GPI), 300 (10.4 GPI) and 200 (11.6 GPI). Includes Accu-Tough inserts with Ballistic collar and GTO nocks with bushings.