Vapor Trail Limb Driver Pro-V Rest Black/Red LH 50970. Free floating launcher supports the arrow for 70 percent of the shot cycle for increased accuracy. Adjustable spring tension allows the shooter to tune the rest to their setup. Activation cord attaches to top limb. Package Contents: Vapor Trail Limb Driver Pro-V Limb driven arrow rest that offers full arrow containment. Free floating launcher supports the arrow for 70 percent of the shot cycle for increased accuracy. Adjustable spring tension allows the shooter to tune the rest to their setup. Activation cord attaches to top limb.