The Pros know! NAP QuikFletch QuikSpin Crush Collection 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.