Specifically designed for use with the Excalibur Matrix series crossbows. Spined for blistering speed, they have a heavier front insert to increase front of center weight for unparalleled accuracy. Features a flatback insert which gives you more consistent contact with the string. Includes front and rear inserts. Length: 18 Inch, Weight: 250 gr. (without point). Factory fletched with 2 Inch vanes.