More penetration, add kinetic punch for thick hide & bone with a full metal jacket. SPECIFICATIONS5MM Full Metal Jacket5mm HIT inserts (16 grains) or 5mm Aluminum 8-32 Half-outs (25 grains) includedpre-installed 5mm X Nocks (9 grains)5mm small diameter, High-strength carbon core with 7075-alloy metal jacketEasy target pullStraightness: ±.002" (±.001" Match Grade option also available)6 pack boxes come in 32? stock length only. Easton FMJ 5mm Size 500 Diamond Plate 2'' Blazer Vanes 72pk 831111