Take your putting

To a Higher Dimension

Perfect Your Distance Control.Learn To Accelerate Properly.Alleviate the Yips.

Stop Levering, Start Swinging

With its unique weighted-string design, the String Theory Putter gives you real-time feedback to master a smooth, controlled stroke.

"I feel I have confidence with every putt and my putting stats have shown marked improvement"

- Niche Golf

"The company is String Theory Golf, and their unique putter/putting training aid is something you must try. First it has the most flexible shaft possible, so making a proper putting stroke takes practice. I’m not saying it takes days to figure it out, but 10-15 minutes or so to understand how you must swing the putter, so it contacts the golf ball correctly."

@Nichegolf, 80K Followers

Providing Feedback On Each Stroke.

The String Theory Putter requires the user to make a perfect swinging motion with the putter head - any incorrect motion will be immediately detected and produce an impure stroke.

Proudly Exhibited at 2025 PGA Show - Inventor's Spotlight Section
Backed by Physics

Backed by Physics

At String Theory Golf, we set out to turn the elusive weight-on-a-string feel into a training aid that helps golfers master the effortless motion of a true swing. Whirling a weight in the air with a string is the purest, physics-backed example of a perfect stroke — and now, you can train that same natural motion every time you practice.
Practice Makes Perfect

Practice Makes Perfect

Practicing with the String Theory Putter will have a huge impact on the tempo and rhythm of your putting. You will immediately feel when your swing is off and be able to correct it quickly. Practice for a just a few minutes daily and you'll have the perfect putt in no time!
The Best Aid on the Market

The Best Aid on the Market

Most training aids use flexible shafts that naturally snap back due to their resilience. While they aim to promote a smoother swing, they don’t require true centrifugal force. Instead, they allow golfers to “lever” the club—applying force in opposite directions—opposite of how a real swing works. A true swing sends force in the same direction through the club, generating a swing, not leverage.

Testimonials

Hear what our Golfers are saying
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Leo TabickOwner of The Golf Performance Academy

"I was quite impressed the first time I tried this product. This gives you immediate access and feedback in creating the rhythm of a pure swing that every golfer should strive for." 

J Michael R.Verified Customer

"My son and I looked at your product at the PGA Show.  I just got this product in the mail and it's the best putting device I've ever used! Just wanted to let you know, thank you!"

Eric T. V.Verified Customer

"Best putting season I've had in a long time. It helped my take away. I was forward pressing previously, and this helped me be mindful of that."

Gary BattersbyTeacher & Owner of Battersby Golf, Inc.  

"It came in time perfectly for one of my lessons, and it worked perfectly. Students saw marked improvement in just one or two sessions. This product is just right!"

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String Theory Golf

Perfect your Swing, with the String

Free Shipping

For a limited time, we are offering free shipping on all domestic orders. All orders are fulfilled within 3 - 5 business days.

Money-Back Guarantee

We are committed to every golfer's complete satisfaction, therefore, if you aren't happy with your String Theory Putter, return it within 30 days.

1 Year Warranty

Our diligence to quality is the upmost importance, therefore, every order comes with a 1 Year Warranty on any product defects.

Customer Service

We are golfers that love helping other golfers! Any questions? Send us an email at ben@stringtheorygolf.com or give us a call (929) 443-9738.