The new Turbo Power XPi square woods set a new standard in fairway woods. With an increased moment of inertia (MOI), they are the most forgiving fairway woods they?e ever created. The Turbo Power XPi square fairway woods offer maximum weight to the extreme corners of the clubhead, raising the MOI for an unparalleled resistance to twisting. The result is straighter and more forgiving shots hit over a wide area of the face. If you are looking for longer and more accurate fairway wood shots, the Turbo Power XPi square woods are more than up to par.