Kahr Arms, in collaboration with Spyderco, has created the Kahr Arms Delica 4 sprint run. åÊThe Spyderco manufactured Kahr Delica 4 is based on a modified blade design from self-defense expert Michael Janich. The 2.5" blade has been chosen to make the knife legal to carry in larger urban areas like Boston and Chicago, while maintaining the intended utility of its design. It features a smooth thumb ramp. The Kahr Delica 4 utilizes the same handle design as Spyderco's popular model, but comes in 3 colors that add another level of discretion. The colors are black, khaki, and denim blue. The hardware and the VG-10 steel blade are non-reflective stonewash finished.