Just like the Stinger, our K1 is very versatile - being an effective fighting knife that you can mount directly on your Tactical but also a robust hunting or utility knife when paired up with the Survival in the back country. The drop-point blade and practical length as well as the tough, corrosion-resistant Boehler N690 steel make the K1 a knife of outstanding quality.Note: For side attachment to the Stinger II, the optional side-mount Picatinny rail is required. There are two screws and nuts for each of the two mounting options in the set. These are attached diagonally for optimal hold or in series (either side by side or on top of each other) for more flexibility