Taylor Made RAC LT II irons. RAC stands for Relative Amplitude Coefficient, a technology TaylorMade developed to improve shot-making and characterised by 'Feel Pockets' in the back of the club head. The Tuned Performance Cartridge Delivers a high moment of inertia which helps preventing twisting of the head on off-centre hits and stability across the entire clubface. The RAC LTs - LT stands for 'Low Trajectory' - feature a slight offset and are designed to promote a more penetrating ball flight. A blade-like appearance at address - but with all the forgiving qualities of a cavity back iron. This updated Taylor Made RAC LT II version incorporates improved RAC technology and a new Tuned Performance Cartridge to deliver extraordinary feel. The redesigned and repositioned Tuned Performance Cartridge saves 16 grams, which is relocated to enhance MOI and CG position and soften impact vibration.