E21 is SQUARE head type with two (2) MID Weight Ports.

E21 features a center-shafted hosel with Perimeter Weighted design with SQUARE. E21 is forged and milled on 4-axis CNC with premium quality S25C carbon steel. E21 is designed with TRIDENT Alignment to improve aim. Ridge Trench Technology (RTT) is implemented to improve aim consistency.