ExtremaRatio NIGHTMARE BLACK pocket knife folding tanto karambit stainless N690The ExtremaRatio NIGHTMARE BLACK karambit delivers tactical power and rescue functionality in a compact folder. Designers built this knife with special intervention needs in mind. Units in Monaco evaluated and adopted the design for demanding tasks. The blade uses Bohler N690 stainless steel, heat treated for 58 HRC. You get excellent edge retention and toughness for heavy use. The blade features a tanto karambit profile that offers both piercing