These hole punches have reverse blade putting an edge on it.

How to use
1. If you drill holes in thick leather from the front side only, the holes may shift on the back side due to the inclination of the rhombus.
By using a standard blade for the front side and a reverse blade for the back side, you can prevent the holes from shifting and make the stitches the same on the front and back sides.
2. The stitching of purses and bags can be made symmetrical in the center.
Please use it with various ideas according to your work.

The history of hand-sewing leather is long, and there are reasons for using diamond-shaped holes.
1) Because the force when hand-sewing is applied diagonally, the leather is less likely to be torn by the force of hand-sewing.
Leather hand-stitched by hand is more durable than machine-stitched leather, because it requires much more force.
Diagonal Hole Punches are based on the same principle.

2) Leather Hand Sewing uses mainly #0 to #8 thick thread.
Sewing machine sewing uses a thin needle and thread, and the seam structure is different.
Leather hand Sewing uses thicker threads and needles, and Diamond Hole Punches are the minimum required holes.
In the long history of leather hand sewing, the diamond shape was the most suitable shape to meet the above requirements.

You can stitch the material horizontally and symmetrical from the centre of the material.

Engraving "reverse" on the edge of the tool, so easily discerning it from normal Diamond Hole Punches.
The whole tool is tempered so no bending and no deformation.

Experimenced craftsman edges the blade by hand on a one by one basis so there's no damage on the leather when you pull off the tool.

The hole has a thinner diamond shape, not like a square and the angre pitches sharply so the seam has a very beatiful hand-sewn touch.