The key element of the T-40 series is the 40-gram Tungsten plug sole insert. While other fairway woods have featured up to 35 grams of tungsten, Nike has developed a design that allows for extra weight low in the club head, which contributes to optimal lift and shot trajectory. Needing less space to provide the same weight as steel, the Tungsten insert frees up room for more weight around the perimeter of the club. Combined with Nike Golf’s signature forged face a hot, thin-faced design the result is a more forgiving club that provides greater distance and accuracy. Nike's unique camber sole design was created to ensure optimum trajectory, so golfers can hit the ball long out of the rough or a divot, but won't experience the pop-up effect of other fairway woods. The T-40 Tour head is blue to match Nike Golf’s forged driver series and has a smaller more compact head preferred by low handicappers. It is available with the Nike Graphite Shaft or the Nike Speed Step Steel Shaft. The Nike Graphite Shafts, lightweight with torsional resistance, are reinforced with a smaller tip diameter (.335 of an inch) for enhanced feel. The Nike Speed Step Shaft is 30 percent lighter and 14 percent stronger than standard steel, helping to create greater club head speed for more distance.