Atoma is a quality diamond sharpening plate from Japan. The manufacturer is Tsuboma. These plates or as I call them stones are almost same size (75mm x 210mm) as a typical whetstone. The size and quality give these stones a long lifetime. The only thing you have to remember is that it is strongly recommended to use water. Never use diamond stone dry.

Another thing to remember is not to use too much pressure while sharpening. While this on mind you will have longlasting sharpening tools on your hands
What separates Atoma from other diamond plate manufacturers is the production technic. Diamonds are placed to the surface of the plate on straight rows & columns. Take a look at the microscope picture behind each grit. This laying method means that there is not going to be large holes or areas where small items might get stuck while sharpening. With Atoma you can also use edges of the plate more securely compares most of the other competitors
We currently hold 4 grit levels on the stock. 140 and 400 are very good lapping stones and good for any rough sharpening. 600 works as a medium-fine stone and 1200, on the other hand, is excellent fine stone. It can be compared to a typical 1000 grit stone.
Atoma diamond plate is clued to the surface of aluminum plate, glass, or plywood. You can also by plate only without the base. This allows you to create stone where you have 400 on the other side and 140 on the other.

Atoma timanttihiomakivi


82,90 €
Atoma timanttihiomakivi


74,90 €
Atoma timanttihiomakivi


74,90 €
Atoma lisäpinta

ATOMA 400 replacement sheet

62,00 €
Atoma lisäpinta

ATOMA 600 replacement sheet

62,00 €


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Terms and conditions

Contact Information

Alvis Oy (BusinessID FI14988400)
Läntinen teollisuuskatu 23 B
02920 Espoo

Mobile +358-41-4573525

Delivery times

All products listed as “in stock” are in our warehouse and ready to be shipped within the next day.  All products include VAT. Prices are subject to change without prior notice.

The estimated delivery time for EU deliveries is 3-8 business days depending on the destination. Finland is covered in 1-2 business days.

Once your order has been shipped, you will receive a delivery notification.

Payment Methods and Shipment Information

We ship to most of the EU countries. Try out from the checkout page and see are we able to answer your need. 

We accept credit card payments & Paypal and IBAN/BIC (SEPA) bank transfers.


All payments are made in Euros. You will see the final Euro price in your shopping basket when paying for the product. 

Refund policy

We accept returns of new, unused merchandise within 14 days from the delivery. Please contact us at to receive return information. The customer is responsible for any return costs unless otherwise agreed to with our customer service. We try to return the money with the same payment method that was used to pay for the order.

After we receive the merchandise and verify its re-sellable condition, we will refund the money. Depending on the item this will take 1-3 days after we have received the item. If there is a delay we will contact you.

Damaged Shipment

In the rare occurrence that the shipment has been damaged, please take pictures and send those to our customer service Also, notify the courier bringing you the shipment that it has been damaged.