Atoma 400 Grit Diamond Lapping Plate - No Handle

The Atoma 400 Grit Diamond Lapping Plate is a precision maintenance tool designed for controlled whetstone flattening and moderate steel removal. Manufactured in Japan by Tsuboman, Atoma plates are trusted by professional sharpeners for their accuracy, durability and long term consistency.

Where the 140 grit is aggressive, the 400 grit offers a more refined approach. It is ideal for maintaining medium to fine stones without removing excessive material.

Why choose 400 grit

The 400 grit plate is ideal for

• Routine whetstone flattening
• Refreshing medium grit stones
• Lighter correction work
• Controlled steel removal

It removes material efficiently while leaving a smoother stone surface compared to 140 grit.

Built for precision and longevity

Atoma plates use mono crystalline diamonds bonded to a precision machined aluminium base. Unlike traditional flattening stones, the Atoma remains flat over time, ensuring your whetstones maintain their accuracy.

• Ultra flat aluminium base
• Replaceable diamond abrasive sheet
• Lightweight yet rigid construction
• Suitable for use dry or with water

When the abrasive surface wears, the sheet can be replaced without purchasing a new base plate.

Why this matters

Flat stones create consistent edges.
Consistent edges create predictable sharpening results.
Predictable sharpening builds confidence and control.

For maintaining premium Japanese kitchen knives, the Atoma 400 is a precise and dependable choice.

Specifications

• Grit 400
• Type Diamond lapping plate
• Handle No handle flat plate design
• Made in Japan