This is a homemade "Bear Deterrent." The main body is made of stainless steel and wrapped with 2mm thick nubuck leather (as shown in the photos). This is a handmade item. There may be stains, distortions, and small scratches. *Firecrackers and lighters are not included. What is a "Bear Deterrent"? It is a tool that amplifies the sound of firecrackers to alert animals like bears to the presence of humans, thus avoiding encounters. It is used as a bear safety measure when entering the mountains for activities such as mountain climbing, wild vegetable gathering, and stream fishing. By setting a firecracker inside the cylindrical body, the sound becomes louder and resonates further than when a firecracker is used alone. How to Use: Insert one firecracker into the tip of the body and ignite the fuse. Using multiple firecrackers simultaneously may damage the body, so caution is required. After lighting, it is said that holding the barrel upright and sliding the firecracker to the bottom of the barrel will make the sound resonate even more. Important Notes: The "Bear Deterrent" is not for repelling bears, but for alerting them to the presence of humans to avoid encounters. Avoid using it towards people. Do not look into the barrel even if the firecracker fails to ignite. Do not use it in urban areas or places where other people are present. If a bear is already nearby or if you are attacked, using the "Bear Deterrent" is dangerous, and other measures such as bear spray may be necessary. Bears have excellent hearing and are particularly wary of low-frequency sounds of around 80-120 Hz and sudden loud noises of around 130 decibels. The loud sound from the bear deterrent encourages bears to avoid humans and leave the area. Users have reported that when used in the mountains, the sound echoes and is loud enough to be heard "even from several hundred meters away." This loud sound and the smell of gunpowder enhance the effect of deterring bears. If you have no experience using this, please research how to use it before use. Use at your own discretion and responsibility.