Cleveland Launcher Driving Iron (LDI) from Cleveland Golf is a hollow hybrid driving iron designed to replace those hard to hit long irons. The specially engineered internal weighting system lowers and deepens the centre of gravity and increases the Moment of Inertia (MOI) beyond that of standard irons. These design features produce a penetrating ball flight with added stability for distance and consistency. The end result is a club that is ultra easy to hit and an excellent choice for tight tee shots and long approach shots. The new wave of hybrid irons are not just for club golfers - an increasing number of tour players use these clubs. Six PGA Tour players put the Cleveland Launcher LDI into play at the 2004 PGA Championship.