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 ensures every aspect of your putting is perfectly straight.
The now-popular zero-torque model is equipped with the latest alignment that clearly shows any deviation in setup. The "Ai-DUAL Square 2 Square HalfBALL Putter" uses a MAX-type head with a large fan shape at the rear, and a white half-ball (half of a ball) alignment with a black line is placed on the front of the top surface. The shaft is mounted at the center of gravity just behind it, achieving the characteristic of keeping the toe up during the stroke. Of course, the face uses the latest Ai-DUAL insert, which is made by layering two resins with a complex curved surface designed by AI. ■The great effect of a semicircle being made of straight and curved lines: The "Ai-DUAL Square 2 Square HalfBALL Putter" can be said to be a zero-torque version of the Ai-DUAL HalfBALL Putter. Of course, the alignment of half a ball is drawn on the front of the top surface of the head. ■Two types of urethane resin, soft on the surface that hits the ball and hard on the inside: As the name "Ai" suggests, the "Ai-DUAL insert" was designed by AI. However, unlike the Ai-ONE insert and Ai-ONE Titanium insert, it is made solely of urethane resin, with a two-layer structure consisting of a soft resin on the surface that hits the ball and a hard resin on the inside. ■An insert that not only stabilizes ball speed but also generates more forward spin: In the Ai-DUAL insert, the boundary between the two layers of resin has a complex, winding shape, similar to the back of the Ai-ONE insert. This was developed by AI with a focus not only on the performance of the Ai-ONE insert, which provides stable ball speed no matter where you hit the ball, but also on the spin that can be imparted to the ball. ■The grooves with an isosceles triangle-like cross-section also contribute to good roll due to forward spin: In the Ai-DUAL insert, the newly adopted grooves, FRD (ForwardRollDesign) grooves, also contribute to good roll. ■Achieves a feel and sound closer to the WHITEHOT insert: The "Ai-DUAL insert" has also been given further consideration to feel and sound. The "Ai-DUAL insert" is made entirely of urethane resin, resulting in a soft feel and a sound closer to the White Hot insert than the Ai-ONE insert. ■The grip is designed to be installed without tilting: The "Ai-DUAL Square 2 Square Half Ball Putter" head features a MAX type with a large fan shape at the rear. This head is paired with a black STROKELAB shaft made entirely of steel, weighing in at around 120g. As before, it offers low torque and increases the overall moment of inertia of the putter. The grip is noteworthy. It is fitted with the "S2S Reverse Taper 2.0 OS grip," which has a triangular cross-section and gradually thickens from the grip end towards the head end. Black Friday
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