This is a Nutcracker for Hazelnuts.

v1: You need:

• Threaded MR rod around 65mm
• M8 Nut (I´ve got main from IKEA). You can use the dimentions for a refferense.
• Standart M8 Nut with dimentions 12.73 on the opposite flat sides.

v2: You need:

• Threaded MR rod around 65mm
• M8 Nut (I´ve got main from IKEA). You can use the dimentions for a refferense. Cut around 6mm from it to leave a space for the second М8 Nut
• 2pcs Standart M8 Nutt with dimentions 12.73 on the opposite flat sides.

UPDATE: It turns out, that some of these wild Hazelnuts are so tough, that the threaded rod get worn out quickly. Also the handle need reinforcement at the bottom ot the thread hole. And the bottom of the Nutckracker needs a piece of hard plastic or metal, otherwise it will collapse. That´s why I published v2 of the models.

Notes:

For the v2 of the Handle you must pause the print between layer 90 and 91 and insert coin of 5 Euro cents. The opening is with dimensions 21.5 x 1.8mm. You can edit it in Fusion360.
I recomend gluing at the bottom of the Nutckracker some kind of hard plastic or metal piece. Epoxy will do the job.

The Fusion360 files are also here.