*The compound deep cavity structure is adopted to maximize the tolerance rate.
*The hitting surface is forged from S20C corbon steel and 2.1mm ultra-thin surface, creating greater rebound performance.
*According to the design concept of under-cut inner cavity, the center of gravity lower and the weight is distributed around, which plays the better in improving the inertia moment.
*The concave back is coated with nano coating to form protection and higher durability.