Callaway Men's Apex Pro Golf Iron Set, Right Hand, Steel, Stiff, 3-PW Tungsten Weighted Inserts: Tungsten weights in the soles of long irons make them incredibly easy to hit while delivering Tour type launch conditions High Performance Wide Grooves: These grooves give you more consistent spin out of whatever lie you're playing from; Get ready for pinpoint control from everywhere Tungsten Weighted Inserts: Tungsten weights in the soles of long irons make them incredibly easy to hit while delivering Tour type launch conditions; High Performance Wide Grooves: These grooves give you more consistent spin out of whatever lie you're playing from; Get ready for pinpoint control from everywhere