N690 The cobalt-alloyed N690 by Böhler (not to be confused with the lower-grade N695) is a very reliable upper middle-grade steel Fox uses for a wide variety of projects. The fine-grained N690, which ranks above 440C, offers convincing performance data in all areas. It is often sold as N690Co – the "Co" stands for cobalt and describes the exact same steel. The black contoured G10 handle scales feature subtle grooves for extra traction and house a liner lock to keep the blade secure during use. Forefinger grooves and a thumb ramp do the same for your hand, making sure you’ve got the grip to get the job done.