2026 Model [US Model] Odyssey Square 2 Square TRI-HOT JAILBIRD CRUISER BLACK Shaft: Odyssey S2S Tri-Hot SL140 Stepless Black Steel Grip: Odyssey - S2S Tri-Hot Cruiser 17 inch Accessories: Putter cover *US Specification (Warranty card not included) As the name "Ai-DUAL Insert" suggests, AI was involved in the design of the insert. However, unlike the Ai-ONE Insert and Ai-ONE Titanium Insert, this insert is made solely of urethane resin, featuring a two-layer structure with a soft resin on the ball-striking surface and a harder resin inside. The "Ai-DUAL Insert" has a non-uniform, complex, winding cross-section at the boundary between the two resin layers. Combined with the newly adopted F.R.D (Forward Roll Design) grooves, AI has developed this technology not only for stable ball speed even on off-center hits but also with a focus on the spin imparted to the ball. The "Ai-DUAL Insert" also ensures consistent forward spin (topspin) regardless of the impact location, creating a roll that is less affected by slopes and grain, and more likely to stay on the intended line. Furthermore, the newly adopted F.R.D (Forward Roll Design) grooves have a structure with 19° grooves from the face. Unlike the wave-like shape of the Ai-ONE Insert, these grooves have a unique shape resembling a series of right-angled triangles, which generates forward spin (topspin). The "Ai-DUAL Insert" also pays further attention to feel and sound. While the Ai-ONE Insert was developed to be similar to the White Hot Insert, some users still commented that it felt "harder than the White Hot Insert" and had a "higher pitch sound," possibly due to being made of resin and aluminum. Since the "Ai-DUAL Insert" is made solely of urethane resin, it offers a softer feel and is designed to produce a sound even closer to that of the White Hot Insert than the Ai-ONE Insert.