One of the problems with handguns is that it's very difficult to keep them both available for immediate use, yet secure against falling into the wrong hands. San Diego-based startup Safety First Arms ...

The Slic Pin (for Self-Locking Implanted Cotter) secures and self-locks through an implanted plunger (locking detent) that functions as a self-contained cotter pin. The Slic Pin (for Self-Locking ...

Self-locking hooks, also known as safety hooks, have changed the lifting industry, but their use has yet to become universal. Self-locking hooks, also commonly known as positive locking hooks or ...