What Mizuno Says:
The new M.CRAFT OMOI introduces heavyweight stability to Mizuno’s forged putter line-up – renowned for its precise looks and feel. The OMOI achieved its new stability by taking a view of the entire club – balancing out the increased headweight with a lighter weight grip and shaft to shift the club’s CG and help control face rotation through the putting stroke.

benefits:

• Milled, Forged, 1025 Steel - Forged from premium 1025 carbon steel and CNC milled, using all the successful fundamentals of the original M-Craft models, the OMOI putters
  a heavier head weight to increase MOI for improved stability.
• Heavier Head Weight - At a weighty 370 grams (#1, #2) and 383 Grams (#3), OMOI Putters offer increased MOI for added stability.
• Additional weights - Additional weights allow for fine-tuning of swing-weight. Includes two 3-gram weights, two 13-gram weights, and a tool. Interchangeable with the 8-
  gram fitted weights.