Introducing Tri-Hot Square 2 Square. A BREAKTHROUGH in Zero-Torque design. We moved the shaft forward so it aims and stays square without the need to forward press. Zero Torque has taken over the putter industry—BUT, due to the visual shift from traditional putters required to achieve "zero torque," many golfers have been unable to benefit from the technology. UNTIL NOW. Our New TRI-HOT Construction has allowed us to reduce the shaft lean and onset, creating zero torque putter with a traditional center shaft setup. PLUS, our New Ai-Dual insert combines the same great distance control of Ai-ONE, with improved top spin form all vertical zones—bringing an innovative new option to anyone looking to make more putts.