Basic specifications
| head | Material: Stainless steel/aluminum sole plate, Insert: Ai-DUAL insert Sole weight: Approximately 10g x 2 |
|---|---|
| shaft | STROKE LAB 120 BLACK steel shaft |
| Content | Grip: Square 2 Square Reverse Taper 2.0 OS Grip (approx. 82g) |
| accessories | Dedicated head cover included |
| Type "1" | Center Shaft |
| Type "2" | Neo-mallet type |
Product List
| Length (inches) | Loft (°) | Lie angle (°) | |
|---|---|---|---|
| 33 Inventory | 33 | 5 | 72 |
| 34 in stock | 34 | 5 | 72 |
Product Description
The significant effect of a semicircle being made up of straight and curved lines.
The "Ai-DUAL 1/2-BALL Putter" can be described as a zero-torque version of the Ai-DUAL 1/2-BALL Putter. Of course, the front of the top surface of the head has an alignment mark for half a ball. Because it is a semicircle, with a straight line at the front and a curve at the back, it is easier to feel the misalignment between the face and the ball when addressing the ball than with a perfect circle. By using the alignment line in the center to align with the ball's alignment, even more accurate setup is possible. In a field test conducted by the golf teams of two American universities, a total of 52 people were surveyed with 1,060 putts. The results were very positive, showing improvements in face angle at address and stability in putting direction. Furthermore, it was found that putts from approximately 2 meters were 1.13 times more successful out of 10 attempts compared to conventional putters.

This insert not only provides consistent ball speed but also generates more forward spin.
The Ai-DUAL insert features a complex, winding shape at the boundary between the two resin layers, similar to the underside of the Ai-ONE insert. This design, developed by AI, focuses not only on the stable ball speed regardless of where the ball is struck, as seen in the Ai-ONE insert, but also on the spin imparted to the ball. Generally, due to the gear effect, a ball struck on the upper part of the face tends to have forward spin, while a strike on the lower part tends to have backspin. Naturally, this also affects the distance the ball rolls. The Ai-DUAL insert is designed to consistently impart forward spin regardless of where the ball is hit, whether on the upper or lower part of the face. Furthermore, because the lower part of the insert forms the same surface as the sole, the distinctive shape between the two resin layers, created by AI, can be seen more directly than in the Ai-ONE putter, which has a transparent polycarbonate window.

The grooves, which have an isosceles triangle-like cross-section, also contribute to the smooth rolling action due to forward spin.
The Ai-DUAL insert also features newly adopted grooves, the F.R.D (Forward Roll Design) grooves, which contribute to its smooth roll. Unlike the wave-like cross-section of the Ai-ONE insert, it has a unique shape consisting of a series of right-angled triangular indentations. The part that makes contact with the ball is angled at 19 degrees relative to the vertical.

Zero torque + half-ball alignment keeps every putt straight.
The popular Zero Torque model now features the latest alignment technology, which clearly identifies setup errors. The Ai-DUAL Square 2 Square Half Ball Putter features a MAX-type head with a large fan-shaped rear and a white half-ball (half of a ball) alignment with a black line at the front of the top surface. The shaft is mounted just behind it at the center of gravity, maintaining a toe-up position throughout the stroke. The face, of course, features the latest Ai-DUAL insert, which combines two resins with a complex curved surface designed by AI. ■The semicircle's combination of straight and curved lines creates a significant effect: The Ai-DUAL Square 2 Square Half Ball Putter can be considered the zero torque version of the Ai-DUAL Half Ball Putter. Of course, the half-ball alignment is also depicted at the front of the head. ■The Ai-DUAL Insert features two types of urethane resin: a soft surface and a hard interior for hitting the ball. As the "Ai" in the name suggests, the insert was designed by AI. However, unlike the Ai-ONE Insert and Ai-ONE Titanium Insert, this insert is made entirely of urethane resin, featuring a two-layer structure with a soft resin surface that strikes the ball and a hard resin interior. ■ An insert that not only stabilizes ball speed but also generates more forward spin: The boundary between the two resin layers of the Ai-DUAL Insert has a complex, winding shape, similar to the back of the Ai-ONE Insert. This was developed by AI with a focus on imparting spin to the ball, as well as the performance of the Ai-ONE Insert, which stabilizes ball speed regardless of impact. ■ Isosceles triangle-shaped grooves also contribute to excellent forward spin roll: The Ai-DUAL Insert's newly adopted FRD (Forward Roll Design) grooves also contribute to excellent roll. ■ Achieves a feel and sound closer to the WHITEHOT Insert: The Ai-DUAL Insert also takes further consideration of feel and sound. The Ai-DUAL Insert is made entirely of urethane resin, providing a soft feel and a sound closer to the White Hot Insert than the Ai-ONE Insert. ■The Ai-DUAL Square 2 Square Half BALL Putter comes with a MAX type head with a large fan-shaped rear. This head is paired with an all-steel STROKELAB shaft in black, weighing in at around 120g. As with previous models, it offers low torque and increases the putter's overall moment of inertia. The grip is noteworthy. It features the S2S Reverse Taper 2.0 OS Grip, which has a triangular cross-section and gradually thickens from the grip toward the head.
Product Review
In-store inventory
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