The JPX-850 marks a new generation of distance generating fairways woods Ð maintaining a generous, hittable size with ideal spin rates and high workability. The primary function of the JPX-850Õs Shock Wave sole is to enable the entire club head to contract and expand on impact Ð delivering more of the energy from the swing to the ball for increased distance. The additional mass also lowers the headÕs center of gravity, enabling easy launch from strikes direct from the turf. There is a 4 degree range of loft adjustment possible within each fairway head through the use of MizunoÕs Quick Switch shaft adjustability. Headcover included. Standard Mizuno warranty applies. Satisfaction is guaranteed.