Developed from Callaway’s innovative golf ball alignment system, the three triple track lines are featured to greatly improve accuracy. A design that is incredibly innovative and simple to use. This Stroke Lab Triple Track TEN S Putter, as with all putters in the Stroke Lab Ten range, has a 7 gram lighter shaft which has allowed developers at the company to strategically position weight into the head of the club. This gives greater stability through impact to give a smoother, more consistent roll. The tried and trusted White Hot Microhinge face insert also helps with accuracy and control of distance on any putt. The most successfully insert in history!