Thin Blue Line Knife and Thin Red Line Knife StrikeForce Gen 3 have been upgraded for a stronger spring system which can easily be detected by activating the switch and a new body designed for better grip and handling. The locking mechanism has proved to have punching power by far the best of all OTF knives. The 440C blade has been improved in Hardening for the best Edge Retention and Sharpness. This knife is made for Everyday-Carry.