Easton Axis Full Metal Jacket Shafts. The Easton Axis Full Metal Jacket is a small diameter and thick-wall carbon core armed in a bone-piercing 7075 alloy metal jacket that gives bowhunters magnum big-game stopping power. The Easton Axis FMJ provides bowhunters higher levels of durability and penetration and easily pulls from high-density targets. The Easton Axis Full Metal Jacket shafts come 12 per package along with Easton X Nocks and Easton Axis Inserts. .Straightness: +/- .002. Weight tolerance: +/- 2.0 grains. Low-glare, hard-anodized diamond pattern finish for easy target pull. High-strength carbon fiber core with 7075 alloy metal jacket. Grains Per Inch: 300= 11.6 gpi.,340 = 11.1 gpi, 400 = 9.9 gpi, 500= 8.9 gpi..Orders for less than a full dozen will be charged an additional $5 handling fee and will only receive inserts.