London, July 2025 – Boutique brand iBPutter Sweet Spot, founded by Spanish PGA professional Iván Ballesteros, is launching its fourth model this month: Quaternion. The new putter is now available exclusively at American Golf stores in the United Kingdom, and will reach Spain, Australia, and Hong Kong starting in September.
After the debut of our brand at the Rusacks Hotel overlooking the Old Course in St Andrews in October 2023, we’ve remained true to our original vision: dual-face design, centered shaft, symmetry, and heavier heads for better feedback and control.
The name “Quaternion” is inspired by the quaternion number system, represented by the letter H, which is used in mathematics to describe three-dimensional rotation. This inspiration is directly connected to the design philosophy of the putter: to promote more efficient ball rotation, enhancing control and precision throughout its entire roll on the green.
Made from 303 stainless steel with 6061 aluminum face inserts, the model also features a premium anti-vibration hybrid shaft (carbon fiber, aluminum, and steel) and a top-quality natural leather grip.
“Quaternion, following the path of the BX2, adopts a more traditional design and continues the balance we seek in every putter,” says Iván Ballesteros.
After launching its first model in late 2023, Quaternion now becomes the latest addition to the growing iBPutter Sweet Spot collection.
Standard specs:
• Loft: 3.5º
• Lie: 70º
• Length: 34 inches
Now available exclusively at American Golf in the UK, with distribution to Spain, Australia, and Hong Kong starting in September.
Press Contact:
iBPutter Sweet Spot
marketing@sweetspotputter.com