The thinner, more flexible Speed Injection Twist Face of the TaylorMade's M5 & M6 Drivers was initially designed beyond legal limits. Using a proprietary algorithm, each head is brought back to the edge of conformity using injected resin for maximum speed. This ensures that each and every custom-tuned head is "hot", eliminating variations found in current drivers. As a result, they're more forgiving, with much larger sweet spots, whether you pick the highly adjustable M5 with its Inverted T-Track sliding sole weights, or the M6 with a complete carbon fiber sole. Both models are joined by a range of matching fairway woods.