Victory TKX Sport Bolts. Constructed with Advanced 3K Carbon Weave Technology these bolts minimize torsional deflection and maximize arrow recovery speed penetration and energy retention. Their EFOC (Extreme Forward of Center) design enhances in-flight stability while 100 percent brass inserts and Victory?s Catch Nock provide durability and strength. Each bolt undergoes Victory?s Spine Alignment process for greater accuracy and is hand-fletched for consistency. With a shaft straightness tolerance of +/- .006 inches these bolts deliver reliable results shot after shot. Specifications for Victory TKX Sport Bolts: Manufacturer: Victory Color: Black Features of Victory TKX Sport Bolts: Length: 20 inches Total weight: 325 grains Insert weight: 110 grains Inner diameter: 0.300 inches Outer diameter: 0.344 inches Shaft straightness: +/- .006 inches (Sport) Advanced 3K Carbon Weave Technology Extreme Forward of Center (EFOC) design Victory Spine Alignment for improved consistency Stiffer spine for increased accuracy Hand-fletched for precision build quality Equipped with Victory Catch Nocks Sold as a 3-pack Package Contents: Victory TKX Sport Bolts