The picture might trick you. The OH2 putter trainer is tiny.

Just slightly bigger than a golf ball, this putter trainer is forcing you to get your swing plane under control. The white engraving on the top is aiming to the take away direction.

Since there is a collaboration with Takumi Japan and some PGA professionals from Japan, the OH2 is widely used on the Asian PGA Tour.

Some golfers have been seen using this putter on the course or tournaments as well.
Why not? Its face balanced orientation is optimal for pendulum swings and suitable for all golfers who are up for a challenge.

It offers an adequate head weight and an incredible feel, as the small head provides a lot of material behind the club face, which makes the impact and feedback very soft.
As its bigger pendant, the OH2 is CNC machined from SUS303 material.