The Triprinciple Theory states that - provided the club face is square at impact - any stroke which falls within the 5.61° marks delineated on the back of the club head will find the cup. This valuable performance benefit has attracted many top pros to put Triprinciple putters in their bag.
The TP-F1B Putter, in addition to being developed with the Triprinciple Theory, has a vertically milled face, which in comparison to traditionally milled faces, provides straighter putts and improved accuracy. Furthermore, the square head shape’s measurements are designed according to the Golden Ratio, and it incorporates a Fibonacci curve design, making the putter more comfortable at address with the club face open.
Additionally, the goose-neck design and a balanced face ensure a stable stroke for a smooth roll.
*Figure based on a scientific theory. Percentage not guaranteed.
1. A vertically milled face ensures straighter putts
A vertically milled face provides straighter shots and better accuracy than traditionally milled faces. Machine testing five-meter putts shows that a vertically milled face results in 3% straighter shots, with 1/5th the variance of a traditionally milled face.
2. Comfortable address with the Golden Ratio head shape
The square head shape’s measurements are designed according to the Golden Ratio and it incorporates a Fibonacci curve design*, making the putter more comfortable at address with the club face open.
*The Fibonacci sequence is a series of numbers in which the sum of the two preceding numbers equals the next number in the sequence. The resulting ratio closely approximates the Golden Ratio. A line drawn tracing the curve of our own Milky Way galaxy would resemble the Fibonacci sequence.
3. As a rule of physics, a putt made within the guidelines will always find the cup
The above diagram illustrates that for putts within a range of one meter, providing the club face is square at impact, any stroke made from 0° (square) to 5.61° (equal to the distance of about one ball, illustrated by the red line above), will theoretically follow the green line and make the putt.
Body：SUS431 Stainless Steel Precision Casting,
Face Milling, Aluminum Plate
Grip: Original rubber grip (with Yonex logo)
Made in Japan
Originator: Kiyonaga (Fukuoka University Professor Emeritus)
Total Weight (g)
Head Weight (g)