Today is a special day: we officially launchQuaternion, the fourth putter model in the iBPutter Sweet Spot family, now available at all American Golf stores across the UK.

The name Quaternion wasn’t chosen by chance. It refers to the quaternion number system—an extension of complex numbers that allows for the description of 3D rotations, widely used in fields such as physics, robotics, and computer graphics. Its symbol is the letter H, and it perfectly represents what we set out to achieve with this model: precision, stability, and a new dimension in putting performance.

Quaternion preserves the DNA of our iconic 373G model:

  • A head with a central spherical shape
  • Heavier head weight than conventional putters
  • Dual-face design for both right- and left-handed players
  • A premium shaft made of steel and carbon fiber
  • A top-quality leather grip

An exclusive putter, engineered with intention—not only visually striking, but truly a performance-enhancing tool on the green.


“Because the game is on the green.”

The brand was first introduced in October 2023 at the legendary Old Course at St Andrews. Today, Quaternion proudly joins the iBPutter Sweet Spot Series as the fourth model in the lineup.

WE HELP STRENGTHEN GOLFERS´ GAME WHERE IT MATTERS MOST.

In putting, consistency is everything — and it starts with hitting the sweet spot. The sweet spot is the precise area on the face of the putter where maximum energy is transferred to the ball with minimal twisting or vibration. Striking this spot ensures a truer roll, better distance control, and greater accuracy.

What makes iBPutters unique is how they redefine this concept through innovation. Each iBPutter is engineered with a cylindrical design and a centre-shafted construction that positions the sweet spot exactly at the geometric centre of the face. This central alignment is not just a design choice — it serves as both a visual and mechanical guide for the player, with the shaft aligned directly behind the sweet spot.

The iBPutter design helps players focus their stroke and strike the ball precisely where it matters most. This is more than design — it’s performance-driven engineering that empowers golfers to improve their putting through better alignment, enhanced feedback, and more reliable results.

Our philosophy, shaped by years of experience, is built on challenging players to bring out their very best. We don’t believe in compensating for weaknesses — we believe in helping golfers strengthen their game where it matters most.

Contact us
Shopping Basket