SST Pure™ The facts are that no shaft is perfectly round, straight or stiff throughout its length. Despite modern manufacturing techniques, every golf shaft, whether steel or composite, remains as unique as a fingerprint and cannot be fully analyzed until after the shaft has been manufactured. The principal planar oscillation plane (PPOP) is the plane of assembly in which the shaft is the most stable when striking the ball. The SST PURE™ process involves identifying the inherent asymmetries within each shaft.
Using patent pending state-of-the-art computer analysis, SST PURE™ pinpoints and correctly aligns the PPOP in the clubhead to optimize shaft stability and performance — ensuring the uniform matching of clubs within a set and allowing each club to perform to the best of its manufactured capability. The SST PURE™ equipment generates a printout that accompanies each shaft that provides visible proof that the shaft has been "PUREd" by SST or its licensees. The printout shows the shaft's performance characteristics before and after the PUREing process.