Chestnut cutter

thingiverse

Insert an M3 screw into a nut and secure it tightly to create a stable base. Next, grab a sturdy blade and place it on top of the nut, holding it firmly in position. Using super glue, apply a small amount to the blade and carefully spread it evenly across its length, making sure not to get any on your hands or nearby surfaces. Hold the blade steady for a few seconds until the glue sets, then release it slowly to ensure a strong bond forms between the blade and the nut.