We developed this product with the idea of creating affordable diagonal hole punches (French style) that can produce sharper stitches than diamond hole punches.
The angle of the thread is acute, giving a sharp impression.

1. about the whole
Tempered is applied to the entire surface from the blade tip to the imprinted area, so there is no bending or deformation.
Gray coating is applied to prevent rusting.

2. About the blade attachment
Each blade is hand-applied and polished carefully, so it has outstanding sharpness.
It is easy to pull out from the leather, so there is no damage to the material.
Immediately after blade attachment, the blade part is protected with resin and shipped.

3. about the blade
The blade thickness and width are uniform, so the size of the hole does not change depending on the thickness of the leather.
Conventional products are tapered, so the size of the hole changes with the thickness of the leather.

4. about non-slip
The handle (60mm) is non-slip.

5. about imprinting
Size (I, II, III, IV) and MADE IN JAPAN (proof of OKA Factory) are stamped.　

Note:
The tool edge is very delicate so please don’t damage it by dropping it or any other improper use.
When you use this tool, don’t punch it with too much force or move the tool from side to side, these actions will cause the prongs to snap off. Please stop punching when you see that the tool edge has made a cut on the under side of the leather. There’s no difference of the seam finishing whether you hit it strong or hit it lightly.

Please consider this as a guide for stitches.
Diagonal hole punches(Ⅰ) = Diamond hole punches(3mm)
Diagonal hole punches(Ⅱ) = Diamond hole punches(3.5mm)
Diagonal hole punches(Ⅲ) = Diamond hole punches(4mm)
Diagonal hole punches(Ⅳ) = Diamond hole punches(5mm)