Tour-Proven Performance. Modern mallet putters designed with Multi materials for high MOI, Stability and Better Pure Roll. Lightweight 6061 aluminum core paired with Heavy 304 Stainless Steel Frame for high MOI to ensure that the face stays square to the path. Pure Roll Insert for Increased forward Roll and distance control. Vibration damping PU foam embedded between the body and frame for enhanced sound and feel. Spider features a unique ÒSQUAREÓ shape for better alignment. Movable Weight Technology to match the desired head weight. SuperStroke GTR 1.0 Grip. Black Finish Steel Shaft. Headcover included.