Abstract: A hollow, fiber-reinforced plastic golf club shaft is disclosed which is tapered from the grip to the hosel and which is provided with an enlarged portion in an intermediate portion so that the flexural rigidity of the shaft is abruptly changed at the enlarged portion.

Abstract: A golf club having shafts and club heads comprised of either: metals, composites, or ceramics which are gas permeable and possess the properties of hollows and cavities respectively. Whereas upon sealing the union of the shaft and the club head renders same air tight. Further, introducing a gas induction valve at the shafts upper end thereby enabling gas induction while also providing a check valve seal to prohibit gas loss after pressurization provides a hermetically sealed golf club. This art applies to any provider of golf club components meeting these generic requirements. Whereas the compilation of components aforementioned while inducing compressed gas dependent upon the type golf club, will enhance the performance of any golf club so modified.