Easton Archery Axis Sport Arrow Shafts are specifically designed for bows with shorter draws and lower draw weights. They utilize a 5mm diameter micro profile, a proven concept that focuses the arrow???s kinetic energy into an ultra-small frontal area which reduces friction behind the broadhead channel and causes deeper penetration. The Axis Sport Arrow Shafts are constructed from aluminum and are compatible with all Axis accessories, including the popular FOC enhancing Easton brass inserts. Features: Designed for use with lower poundage/shorter draw bows Aluminum construction Compatible with all Axis accessories Easton Axis 5mm Size 400 Match Grade Shafts 12pk 527752