Hot Launch C523 Fairway Wood The 17-4 stainless steel Competition Spec Hot Launch C523 Fairway Metal features a classic design and setup for the player seeking optimal spin rates, while still enjoying the benefits of extreme forgiveness. FEATURES SOLE RAIL DESIGN The C523 fairway features a new sole rail design that extends from the leading edge to the trailing edge. The new sole rail produces a super-low CG for high-launching shots with optimized spin rates and maximum ball speed off the face.