It seems like you’re referring to a product, likely a metal walnut nutcracker that is 18 cm in size and possibly identified by a model number such as “5219.” The mention of…

How to Use the Metal Walnut Nut Cracker

Step 1: Prepare Your Workspace

• Find a stable and clean surface to work on.
• Ensure you have good lighting so you can see clearly.
• Gather the walnuts you wish to crack.

Step 2: Position the Nut Cracker

• Hold the nut cracker in one hand, ensuring a firm grip.
• Open the nut cracker by pulling the handles apart.

Step 3: Insert the Walnut

• Place a walnut between the jaws of the nut cracker.
• Position it centrally to ensure even pressure.

Step 4: Crack the Walnut

• Squeeze the handles of the nut cracker together slowly and firmly.
• Listen for the cracking sound, which indicates the shell has broken.
• Be careful not to apply too much pressure to avoid crushing the nut inside.

Step 5: Retrieve the Nut

• Open the nut cracker and carefully remove the cracked shell.
• Extract the walnut from the shell.
• Inspect the nut for shell fragments and remove any if necessary.

Step 6: Clean Up

• Dispose of the shell fragments properly.
• Wipe down your workspace to remove any residue or dust.
• Store the nut cracker in a safe place for future use.

Additional Tips

• Practice with a few walnuts to get a feel for the pressure needed.
• Do not use the nut cracker on overly hard or inappropriate items to avoid damage.