This is a 911 Hoffman Rescue tool made by Seizo Imai in Seki, Japan circa 1990s. This knife is used by law enforcement, paramedics, corrections departments. It is the safest and fastest method for cutting seat belts or harnesses and clothing, ropes or other fibrous materials adjacent to living tissue. The hook shaped blade is specifically designed for rescue applications. It quickly and safely cuts ropes, lines cords and tubs up to 1 1/2" diameter. This design is safer to use than other rescue knives or scissors. It rescues strangulation or accident/fire/hostage victims whenever fibrous materials must be quickly cut away without cutting victim. Will not slash or stab - cannot be used as a life threatening weapon. This one has a glass breaker included into the design. There are copies out there, but none are made in the same high quality as this original version. Comes in the box with black nylon sheath specific to this model