WHAT YOU NEED TO KNOW Graphite iron shaft High stability with reinforced tip section ISO-6 technology increases symmetry for tighter dispersion SPECIFICATIONS Series Flex Weight (g) Torque Launch Tip Dia. But Dia. Length Catalyst 40 4.0 (Senior/Ladies) 57g 5.5 Mid-high .370" parallel .587" 41" Catalyst 50 5.0 (Regular) 63g 4.5 Mid .370" parallel .587 41" Catalyst 60 5.5 (Regular+) 68g 4.5 Mid .370" parallel .595 41" Catalyst 60 6.0 (Stiff) 68g 4.5 Mid .370" parallel .595 41" Catalyst 80 6.0 (Stiff) 85g 3.5 Low-mid .370" parallel .595 41" Catalyst 80 6.5 (X-Stiff) 85g 3.5 Low .370" parallel .595 41" INSTRUCTIONS >> Project X Catalyst Iron Shaft Trimming Instructions FULL DESCRIPTION Catalyst is the next step in graphite iron design. Featuring our new Iso-6 material technology, Catalyst is engineered to replicate steel alloy properties over 100% better than traditional graphite laminates. This allows for an extremely stable shaft that maximizes constancy and distance control while providing the benefits of a graphite body design. Catalyst also features a reinforced tip section which, unlike traditional graphite, delivers torsional resistance comparable to that of steel—improving stability during turf interaction for better impact on less than perfect shots. ISO-6 technology bridges the gap between what a steel shaft is and what a graphite shaft can be. Traditional graphite laminates are only 35% as symmetrical as steel. Through advanced material modeling and analysis, Project X engineers constructed a new laminate design to eliminate weak spots found in graphite iron shafts due to the lack of symmetry. With ISO-6 being 75% as symmetrical as steel (over 100% better than traditional graphite laminates), graphite iron shafts made with ISO-6 provide superior accuracy in comparison to the competitors' shafts. New to iron shaft fitting altogether? Our Iron Shaft Buyer's Guide covers material, weight, and flex from the ground up.
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