The Pros know! NAP Quikfletch shrinks your groups and extends your kill zone. The Quikfletch™ Pro Series Vane System feature NAP"s patented QuikSpin SPEEDHUNTER kicker/micro-groove technology that that spins arrows up to 6 times faster than conventional vanes. Result? Stable, straight driving arrows for tack-driving accuracy and optimum penetration. QuikFletch QuikSpin ST features NAP"s patented kicker and micro-grooved combination on the 2" vanes. This spins arrows up to 300% faster than conventional vanes. Result - increased accuracy, tighter groups and extended effective kill range. Award winning performance for hunting, 3D, or competition shooting.