Round hole drive punches are made with special attention paid to the quality of the punching out.
The sharpness of the cutting edge and the tapered shape (inside diameter) that allows the extracted leather scraps to come out without stress realize excellent punching performance.

- Tapered inside diameter -
We are particular about making the inside diameter of the hole tapered.
We have succeeded in making the inside diameter tapered by our original processing.
Leather scraps can be pulled out without stress, so there is no need to hit the hole hard when drilling.
Also, there is no stress when the leather scraps clog up and prevent the hole from opening, as is the case with other companies' products.

- Shape of the blade edge -
The shape of the cutting edge is rounded, which is our commitment to the rounded shape of the cutting edge.
The basic structure of Diamond drive hole punches is a tool that cuts by striking (push cutting).
Therefore, by making the tip of the blade gently thicker, we have dramatically improved the blade's durability.
It is not a thin and durable cutting edge like other companies' products, which focus on initial sharpness only.
Furthermore, the edge of the blade is polished to improve the pull-out performance.
Please compare the sharpness duration with other companies' products.

- Protection of the blade -
In order to provide our customers with the best cutting performance, we coat the blade with oil resin to protect it immediately after blade attachment.

- Material -
We consider round drive hole punches as cutting tools.
The material used is tool steel, a material suitable for blades and durable.

- Tempered -
The entire round hole drive punches are tempered to increase metal hardness.
Since the metal hardness of round drive hole punches is tempered with a set numerical value, durability is outstanding.

- Overall length -
The overall length of our round hole drive punches is 110mm.
Most common round drive hole punches have a short overall length of about 85 mm, and this has improved the problem of striking the Round maul's hand when striking the puncher.
Especially for thick-diameter pigeonholes, the punching requires a lot of force to punch the hole, so if the overall length is short, it is a source of trouble.
The difference in length makes a complete difference in the stability of the tip of the cutting edge, so there is no failure.
Please compare our product with other companies' products.
You will see the difference in ease of use.

- Non-slip -
The non-slip handle is designed to ensure that the work can be performed reliably and accurately.

- Coating -
The entire surface is treated with a black coating to prevent rust.

- Size and country of production (OKA Factory) -
The size is specified in millimeters (mm).
The country of production, "MADE IN JAPAN (OKA Factory)" is stamped on the back.