# Simple method of making homemade metal knives It is feasible to make base metal tools without professional equipment, but please pay attention to safety and legal restrictions. Here are some relatively simple methods： ## Feasible raw materials -Old saw blade or hacksaw blade -Automobile spring steel -Steel plate of abandoned filing cabinet -Large steel file ## Simple production process 1. **Material preparation**: Choose the appropriate steel to ensure sufficient hardness 2. **Preliminary forming**： -Use a grinder or file to roughly grind out the shape of the knife -If there is no power tool, you can use a hand file to slowly form 3. **Heat treatment**(increase hardness)： -Simple stove is heated until the steel turns red (about 760-820°C) -Rapid cooling (oil or water, depending on steel) -Tempering: low temperature heating again to reduce brittleness 4. **Final polishing**： -Step-by-step sandpaper sanding from coarse to fine -The edge can be polished with a belt or stone 5. **Handle making**: Can be wrapped in wood, rope or other materials ## Precautions -Homemade knives may not be safe or durable enough -Please ensure compliance with local laws and regulations - Pay attention to protecting your eyes and body during production -This method is only suitable for making simple tools, not for precision tools Do you have any specific steps you want to know?