Description GOHUNT Highlights High-strength carbon core with 7075 alloy metal jacket Deep Six thread steel HIT inserts Pre-installed Deep Six nocks Manufacturer Highlights Easy target pull Weight tolerance: 2 grains Straightness: .002" For use with Deep Six broadheads & field points. BreakdownDeep Six ultra-micro 4mm comes with the most modern broadhead connection. Maximize your bow with the most penetration. Specs Grains Per inch 280 - 12.0 Outside Diameter 280 - .243 Factory Length 280 - 32.5" inches Qty Per Pack 12