The Mizuno M.Craft X B4 is part of the M.Craft X series — the ultimate fusion of precision engineering and customisable performance from Mizuno. Designed for golfers seeking the perfect balance of feel, forgiveness, and adaptability, the M.Craft X puts complete control in your hands, allowing you to tailor your putter to fit your exact stroke. The B4 features a Slant Neck configuration with natural toe hang, making it an outstanding choice for golfers with a stronger arc to their putting stroke. Like every M.Craft X model, the B4 blends Mizuno's heritage of precision forging with modern performance technology to deliver a putter that is both a work of art and a performance powerhouse. Included in the box is a matching headcover.
At the heart of the M.Craft X is Mizuno's signature dedication to craftsmanship. The face and neck are forged from a single, continuous piece of soft 1025 mild carbon steel — the same grade of steel Mizuno has trusted for decades in its most prestigious forged irons. This manufacturing approach eliminates seams and joins in the most critical impact zone, producing an exceptionally pure, soft sensation at every contact. The direct steel-to-steel energy transfer also maximises feedback, so you always know precisely where the ball left the face. For golfers who have played Mizuno forged irons and love the feel, the M.Craft X delivers that same signature sensation through the putting stroke.
The face of the M.Craft X is CNC-milled to exacting tolerances, ensuring flawless geometric consistency across the entire striking surface. Deep milling grooves on the face create a softer, more controlled contact with the ball, promoting a true end-over-end roll from the moment of impact. Unlike cast faces that may have minor surface irregularities, the CNC process guarantees every putter leaves the factory with the same face geometry — delivering predictable speed control and a reliable roll regardless of where on the face contact is made. This precision is the difference between a good putt and a great one.
The M.Craft X achieves what many golfers consider the ideal combination: the precise, responsive swing feel of a traditional blade putter paired with the superior forgiveness and stability of a modern mallet. This is made possible by a dynamically shallow centre of gravity that mimics the CG position of a classic blade, giving you the sense of control and finesse that confident putters demand. At the same time, the larger mallet-style head design, combined with interchangeable weight ports, delivers a high Moment of Inertia (MOI) that keeps the face stable and square through the stroke — even on off-centre strikes. The result is a putter that is forgiving enough for the most demanding rounds, yet precise enough for the most critical putts.
To complement the forged steel face and neck, the M.Craft X incorporates an aerospace-grade milled aluminium back section. Aluminium is significantly lighter than steel, which allows Mizuno's engineers to redistribute mass to the perimeter of the head where it has the greatest impact on MOI. The result is enhanced stability on off-centre strikes without adding excess weight to the overall head — preserving the natural, responsive feel that Mizuno putters are celebrated for. The milled surface of the aluminium back also adds a premium aesthetic quality and ensures a tight, consistent fit with the steel body through the assembly process.
The B4 model is built around a Slant Neck hosel that creates natural toe hang, making it the ideal choice for golfers whose putting stroke follows a pronounced arc. During an arcing stroke, the putter face naturally rotates open on the backswing and closes through impact; the toe hang of the B4 Slant Neck encourages this face rotation, working with the player's natural stroke mechanics rather than against them. Across the M.Craft X range, you can also choose from Plumber Neck (face-balanced, for straight strokes) and Bend Neck (mild arc) options, giving you the freedom to select the neck style that perfectly matches the way you putt.
Every M.Craft X putter is fitted with a Lamkin Sink Fit grip that carries a distinctive modern mosaic pattern inspired by the year 1906 — the year Mizuno was founded. This tasteful detail connects Mizuno's newest and most technologically advanced putter line to over a century of tradition, innovation, and craftsmanship. The same 1906 mosaic motif is carried through to the premium matching headcover included with every M.Craft X, creating a cohesive, collector-quality presentation. It is a subtle but meaningful reminder that world-class performance and heritage craftsmanship need not be mutually exclusive.
| Model | B4 |
| Hand | Right Hand |
| Length | 35" |
| Loft | 3° |
| Lie Angle | 70° |
| Offset | Full Shaft |
| Neck Style | Slant Neck (Toe Hang) |
| Material | Forged 1025 Carbon Steel body & face; milled aluminium back |
| Shaft | KBS CT120 |
| Grip | Lamkin M.Craft X Sink Fit |
| Headcover | Included |
Lamkin M.Craft X Sink Fit grip — featuring the signature 1906 heritage mosaic pattern exclusive to the M.Craft X series.
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