SQUARE TO SQUARE (STS)
With the Z Factor Perfect Putting Machine set up in the STS mode you will be learning the muscle memory of a SQUARE TO SQUARE putting stroke. In this stroke the putter travels straight back and straight through on the target line. The face of the putter is always pointed at the target during this stroke. This style of putting is used by golfers of all skill levels including PGA tour players, but may be especially helpful for beginners and for practicing short putts.