The JPX925 Hot Metal redefines the performance of an already industry-leading franchise. CORTECH Design: Optimized face thickness distribution to maximize COR AREA Seamless Cup Face: Thinned areas revolving 360 degrees around the perimeter increase rebound area for maximum ball speed across the entire face Variable Sole Thickness: Increase overall face flex area for add CORAREA Harmonic Impact Technology: Fine tuned head geometry delivers ideal impact feel and feedback Acoustic Sound Ribs: Precisely dial in specific vibration patterns for a solid, explosive impact sound White Satin Brush Finish: A modern elegant, yet durable non-glare finish Chromoly 4140M : With its high strength to weight ratio and malleability, Chromoly allows for a high strength face with a bendable hosel for fitting.