Callaway Odyssey Works Tank Cruiser #7 Putter Quicker roll with Fusion rx: we've taken our most Legendary insert of all-time that's our best feeling, best selling, with the most Tour wins and combined it with unbelievable new roll technology for the Fusion rx insert. It's where feel meets roll Major-winning versa alignment: you've seen how the world's best players trust this visionary alignment. The silver and black contrast lets your eyes key in on the Linear designs to highlight the proper Face angle from address to impact Adjustable counterbalance weighting: adjust your head weight and grip weight to Dial in your Putter balance. This is how you get the feel and stability you want for your most consistent stroke V-line head weight: 375g (adjustable to 365g or 385g) #7 head weight: 375g (adjustable to 365g or 385g) #1 head weight: 375g (adjustable to 365g or 385g) 2-ball fang head weight: 385g (adjustable to 375g or 395g)