The B-2 Dog Tag is a military-style, dog tag sheath you can wear around your neck or store in your pocket. At less than 2oz, it’s incredibly lightweight. With an open length of 3.7″ and a closed length of 2.75″, it’s incredibly discrete. 440C black, stainless steel construction makes it it incredibly tough and stealthy. In practice, it’s a dog tag with a separate, key-sized blade that can be removed and re-inserted to create a blade and handle setup that’s versatile, durable, functional, and everything you’d need in survival knife you can carry in a coin pocket, bag or around your neck. UltraLight Weight: <2oz Length of Knife (opened): 3.7in Length of Knife (closed): 2.75in Length of Blade: 1in Thickness: 0.2in Handle Length: 2.5in Materials (Blade and Body): 440Carbon Black Stainless Steel Hardness: 58-60HRC (Rockwell Hardness Scale) Color: Jet Black