Open frame mallet head putters are growing in popularity with amateurs and professionals for several reasons:
- They offer improved alignment.
- They offer a higher moment of inertia.
- They offer a wider weight adjustment range.
- They easily accommodate a center shaft adjustable lie angle feature .
All of the above lead to a higher performing putter.
The open frame design allows weight to be removed from the center of the putter head and concentrated at the rear of the putter head. This raises the moment of inertia and helps reduce twisting of the putter head on impact with the ball. It also helps keep the putter slightly”tail heavy” which produces dynamic loft and improves roll.
Concentrating the weight in the rear of the putter head allows for a wider range of adjustable weights to be used.
The open frame structure is perfect for the addition of sight lines to simplify alignment. And, by if spaced the width of the golf ball they will assist in proper setup for consistent striking of the ball for best distance control.
Finally, by moving material from the center of the putter head there is room for a center mounting shaft design. This will allow for a mechanically simple lie angle adjustment design which can be made to conform with the USGA rules of golf. The rear mounted center shaft also promotes a straight back-straight through putting stroke for maximum accuracy.