The legality of openly carrying a fixed blade knife with an 18 cm long blade on the belt varies depending on the specific laws and regulations of the jurisdiction in question. In many places, carrying a knife of that size openly may be restricted or prohibited, especially in urban areas or public spaces. It is important to research and understand the laws regarding knife carry in your specific location to ensure compliance and avoid any legal issues. **

One option that fits the criteria is the Morakniv Companion Fixed Blade Outdoor Knife. It has a blade length of 10.6 cm, just under 12 cm, and comes with a durable plastic sheath that securely conceals the knife when not in use. The knife is known for its high-quality stainless steel blade and comfortable handle, making it a reliable choice for outdoor activities. **

One option that fits your criteria is the Morakniv Companion Fixed Blade Outdoor Knife. It has a blade length of 10.6 cm, just under 12 cm, and comes with a durable plastic sheath that fully covers and hides the knife when not in use. The knife is known for its high-quality stainless steel blade and comfortable handle, making it a reliable choice for outdoor activities. The sheath also features a belt clip for easy carrying. **

One way to dull a knife blade is by using it on hard surfaces such as glass or ceramic. Another method is to use the knife to cut through tough materials like metal or hard plastic. Additionally, storing the knife improperly, such as leaving it loose in a drawer with other utensils, can also cause the blade to dull over time. **

To blunt a knife blade, you can use a sharpening stone or a honing steel to grind down the edge of the blade. Another method is to use a file to remove material from the cutting edge. It's important to be cautious and go slowly to avoid damaging the knife. Additionally, using a knife block or sheath to store the knife when not in use can help prevent the blade from becoming blunt. **

The Karambit knife with a sharp blade is typically made of high-quality stainless steel or carbon steel. These materials are known for their ability to hold a sharp edge for a long time, making them ideal for cutting and slicing tasks. Additionally, some Karambit knives come with a serrated edge, which can also contribute to their sharpness and cutting efficiency. It is important to regularly maintain and sharpen the blade to ensure it remains sharp. **

I recommend looking for a fixed blade knife with a blade length of around 11 cm to meet your requirements. Knives from reputable brands like Gerber, Buck, or Benchmade often come with high-quality sheaths that offer good concealment. Make sure to check the specifications and reviews of the knife to ensure it meets your needs for both size and sheath quality. **

To make your knife blade shine, you can start by cleaning it with warm, soapy water and a soft cloth to remove any dirt and grime. Next, you can use a metal polish or a polishing compound specifically designed for knives to buff the blade and bring out its shine. Make sure to follow the manufacturer's instructions for the specific product you choose. Finally, you can use a clean, dry cloth to buff the blade to a high shine. Regular maintenance and cleaning will help keep your knife blade looking shiny and new. **