KILLERTECH™ PRO 20” CROSSBOLTSThese ‘Killer’ carbon crossbow arrows are designed for Superior Performance, delivering a perfect combination of SPEED, KINETIC ENERGY and ACCURACY. The overall weight of the arrow including a brass insert for optimal F.O.C. maximizes accuracy without loss of speed or energy. - Optimized F.O.C. Accuracy- Guaranteed Straightness & Performance- 3” Bohning X Vanes and Half Moon Knocks pre-installed*Field Points Required - Not IncludedSPECIFICATIONS:LENGTH: 20”INNER/OUTER DIAMETER: .300” / .346"SHAFT WEIGHT: 9.0GPISTRAIGHTNESS: +/_ 0.003” maxThese bolts work with MOST ALL major manufacturer crossbows, however, review your Crossbow Instruction Manual to determine compatibility and for overall safe use of carbon arrows prior to use.CAUTION: INSPECT EACH ARROW FOR INTEGRITY BEFORE EACH SHOT.