Black Eagle Executioner 18″ 6pk. This “killer” carbon crossbow arrow is designed for superior performance, bringing you speed, kinetic energy, and accuracy. The overall weight of the arrow includes a brass insert for optimal F.O.C. which maximizes accuracy, increases kinetic energy, and minimizes the loss of downrange speed. This is the best crossbow arrow on the planet. Specs: +/-1 Grain Weight Tolerance .001″ Arrow Straightness .300″ Inside Diameter .346″ Outside Diameter 92 Grain Brass Insert 9 Grains Per Inch ALL crossbow arrow nocks are pressed fit and are NOT glued. These bolts work with MOST All major manufacturer crossbows!!