I am a big fan of knives for self defense purposes, but I cannot figure out when and how a neck-knife is going to get used in this role. Unless you get it out before the physical fight starts it’s probably not going to end up in your hands.
Because the knife is suspended like a pendulum by neck cord, it is always going to be in a different place. As soon as you start moving the knife is going to begin to swing. If you are taken to the ground there is a good chance that the knife is going to end up in your armpit.
Most neck knives are suspended from a break-away chain (to prevent you from getting choked with the cord) but if grabbed you stand a fair chance of loosing the knife because of the breakaway chain.
If the neck knife is worn concealed (under a shirt) I don’t think there is much chance of getting to it once the fight starts. If the assailant gets any sort of “mount” (what was once called the “Schoolboy pin”) It’s going to be a challenge to get that knife working. If the knife isn’t concealed it is pretty inviting for the assailant to grab, especially since it is pre-positioned over your vitals.
