The world's first arrow with carbon Nanotube technology, for unparalleled strength, superior accuracy, and built-in vibration control. Straightness of ?2 grains. Includes X-Nick installed, HIT insert, chamfer stone, installation tool, and HIT epoxy. 12 pack. Nano Fused New Carbon Technology Carbon Nanotubes are the strongest, lightest substance known to exist. Nanotube Hybtonite resin produces lightweight arrows with increased strength and built-in vibration strength for more power. Hidden Insert Technology (HIT :) Hit 'em hard with the point insert system from Easton. HIT inserts align the broadhead shank directly against the inside diameter ox Axis arrow shafts for superior broadhead accuracy, increased penetration, and unrivaled power. Easton Carbon Shaft Selection Chart Draw Wt. Shaft Size (lbs.) 27" 28" 29" 30" 31" 45-50 500 500 500 400 400 50-55 500 500 400 400 400 55-60 500 400 400 400 400 60-65 400 400 400 400 340 65-70 400 400 400 340 340 70-76 400 400 340 340 - 76-82 400 340 340 - -