NEW HIGH PENETRATION 5MM Axis SPT carbon arrows FOR SHORTER DRAW/LOWER POUNDAGE BOWS. Easton's Axis SPT is the newest member of the legendary AXIS lineup offering improved field performance for bowhunters with shorter draws and/or lighter-poundage setups. Features Spine Sizes: 260, 300, 340, 400, 500 Grains/Inch: 260-11.5; 300-10.7; 340-9.5; 400-9; 500-8.1 Stock Length: 260-34, 300- 32.5, 340-32, 400-31.5, 500-31 Pre-installed X Nock X HIT 8-32 inserts Straightness: ± .006” High-strength carbon-composite fibers Video -Easton 5mm Axis SPT Dozen Arrow Shafts