There is a reason why the PGA Tour banned the use of pendulum putters. They work!

The Pendulum Putting Rod allows you to feel how the arms, shoulders, hands and sternum should move during the putting stroke.  A player with the tendency of inconsistent speed control (the use of the hands instead of the big muscles) needs the Pendulum Putting Rod. 

You will find exactly how you should stroke putts with your big muscles.  Under pressure this is the ONLY way to putt consistently.