The width of the Sword is calibrated with a margin of error so it mimics making putts of longer lengths.
A Few Calculations:
A Golf Ball is 1.68". The cup is 4.25". The .5" on the bottom of the ball contacts the putting surface.
The Sword is the width of the ball. When the ball goes off line .5" it falls off the Sword.
This margin of error combined with the length of the putt creates a direction angle the putt can roll off-line and still fall in the cup.
If the putt rolls off the end of the Sword then it will go in the cup from the distances marked.
Find a straight putt and set the end of the Sword 12 inches from the cup (or wall if used indoors).
Set a ball on the "3 foot" line (it is 12" from the end of the Sword). Hit putts and roll them off the end of the Sword. This is the equivalent of sinking a 3 foot putt. When you can successfully roll 5 consecutive putts, move back to the "6 foot" line and repeat. Repeat from the end of the Sword and you are a Master.
Hit a single ball from each of the distances marked on the Sword
Tour Average Drill
Tour players make 75% of 5' putts, and 50% of 8' putts.
Use the marks on the Sword to see if you can putt at Tour skill level.
Create the Ultimate Putting Station
Add the Putting Alignment Mirror to create a simple and effective practice station.
Slide the mirror on the "handle" of the Sword.
Check your eye alignment, putter face and restrict your stroke length.
You can also create a putter gate with tees in the slots of the mirror.
The result? Drills that address alignment, impact position, stroke length and path. Wow!