"MARUKIN" Uramaru Oire-Nomi (Back Round Chisel) Shirogami no.2 Steel 6mm-30mm

■Material: Shirogami No. 2 steel + extra soft iron

Blade shape: Rounded

■ Pattern: Red oak

■Features:

This is our most standard professional chisel.

It can be used by many people, from the general public to professionals.

■Caution

Since the pattern is applied to this product after your order is placed, delivery will take a considerable amount of time (it may take more than two months depending on the situation).

Please understand this before purchasing.

The photo above is of a 30mm product.

■About delivery time:
Because this product is produced in small quantities, if the manufacturer is out of stock, delivery times will be significantly longer.
If we determine that the delivery time will be longer than three months, we regret to inform you that we will cancel your order.
Furthermore, due to the manufacturing process, there is a possibility that the delivery time may be delayed beyond the originally announced date. Because the order status and manufacturing progress of this product are fluid, we may not be able to receive a response from the manufacturer regarding detailed progress or a definite delivery date after your order is confirmed.
Thank you for your understanding.

■Need Setting Up KATSURA Japanese Chisels

About the Katsura (Ferrule) on Japanese Chisels
Japanese chisels have a steel ring called a katsura on the end of the wooden handle.
Before using the chisel for the first time, the katsura needs to be prepared.
This helps prevent the handle from cracking and makes the tool safer and longer‑lasting.

Step 1: Remove the Katsura
Lightly tap the end of the handle with a wooden mallet to loosen and remove the katsura.
Do not pry it off with force, because it may bend.

Step 2: Chamfer the Katsura
Use a file to round (chamfer) the edge of the katsura.
Some katsura are already chamfered, so check first.
The katsura has a correct direction:
- Thick side → end of the handle
- Thin side → blade direction
When chamfering, file the thin side at a shallow angle.
If the handle is not chamfered, the sharp edge of the katsura will cut into the wood.
Then it will not go in deeply and may come loose later.
If you are unsure which side is up, try inserting it lightly and see which way fits better.
A good chamfer angle is 20–30 degrees.

Step 3: Adjust the Handle
After removing the katsura, there may be a small step or uneven area.
Trim this area neatly using a chisel, plane, or file.
A recommended method in Japan is called KIGOROSHI.
This means lightly hitting the wood to compress the fibers.
Compressed wood makes it easier to insert the katsura, and later the wood expands again to hold it tightly.
Do not hit too hard.
If you overdo it, the wood fibers will not recover.

Step 4: Reinstall the Katsura
Push the katsura onto the handle by hand as far as you can.
Then tap it in evenly with a wooden mallet.
Do not hit it directly with metal.
The ideal position is about 2 mm from the end of the handle.
If the handle sticks out too much, it will become soft over time and reduce the chisel’s performance.

Step 5: Adjust the End of the Handle
Tap the end of the handle little by little while rotating it.
This spreads the corners outward.
It is fine as long as the crushed corners overlap the katsura.

■Caution

Please use a whetstone specifically designed for high-speed steel when sharpening.

Our recommendation is KYO HIGASHIYAMA series .

■Blade width: 6mm

Item no. 1110992

■Blade width: 9mm

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■Blade width: 12mm

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■Blade width: 15mm

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■Blade width: 18mm

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■Blade width: 24mm

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■Blade width: 30mm

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Import duties; taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility.