Serious golfers know technology and innovation are game-changers, and nothing has proven that on Tour more clearly than SteelFiber graphite iron shafts.

SteelFiber golf shafts introduced an entirely new technology category in iron shafts. Players no longer need to decide between 100% graphite or 100% steel. SteelFiber combines the power of graphite AND the stability of steel. SteelFiber’s unique composite design lowers scores and increases player enjoyment, and SteelFiber’s performance benefits have now been embraced as custom options with every major equipment manufacturer.

At the core of the SteelFiber shaft is filament-wound carbon fiber. The filament winding process yields a seamless and incredibly uniform bending golf shaft. The high strength-to-weight ratio of carbon fiber delivers the desired stiffness and strength properties at lighter weights than steel, and the lightweight properties of graphite increase clubhead speed and promote greater distance. In addition, the vibration dampening properties of graphite reduce the risk of injury and player fatigue during the round.

The steel fiber material is produced using a bundle drawing process that utilizes multiple reductions in the diameter of stainless steel wire. Once the wire becomes thin enough, 1,000 individual wires are bundled together and placed inside an iron tube that is further reduced until each individual steel wire is 8 microns in diameter. Each 8 micron steel filament is approximately 1/10th the diameter of a human hair. Finally, 3,000 individual filaments are combined and spun onto spools.