Combine the precision and straightness of aluminum with the stiffness, durability and extra speed of carbon, and you have Easton's Full Metal Jacket arrows for pure hunting perfection. Construction utilizes a small-diameter, thick-walled carbon core with Hidden Insert Technology for armor-piercing penetration and superior durability. Low-glare, microsmooth alloy surface reduces wear on the arrow rest, eliminates draw noise and makes for easier removal from targets. Match Grade Version for Even More penetration, add kinetic punch for thick hide & bone with a full metal jacket. Spine Sizes: 250, 340, 400, 500 Grain/Inches: 250- 11.5 gpi; 340- 11.3 gpi; 400- 10.2 gpi, 500- 9.1gpi Stock Length: 250- 33; 340- 31; 400- 31.5; 500- 31 Nocks and HIT inserts included