The gold standard in polespears, JBL's one-piece models are drawn 6063, annealed for extra rigidity. The end result: maximum energy transfer with virtually no flex. JBL machine-swaged each spear for enhanced hydrodynamics. This provides greater speed with minimal water disruption. Travel polespear (two and three piece) feature precision machined unions for seamless fit and feel and allow for infinite extendability. Sling length is fully adjustable and the stainless threaded tip will accept and 6mm (7mm if specified) point.