|Doug Ritter Neck Knife|
Typically for neck knife carry; you will need a knife that has a blade of 3" or less. Larger knives can become unwieldy and uncomfortable. I have seen some carry a Mora knife with a longer blade but this has a lot to do with the lightweight build of those knives.
|RAT-3 in Neck Knife Mode|
Neck knives can be suspended from paracord or a beaded Dog-Tag style chain. The benefit of the beaded chain is that it can be broken to prevent choking.
I do suggest carrying a knife in the handle down position for quick access. With the handle down carry, you will need a secure sheath fit to prevent loss or injury to yourself.
The foremost benefit to this style of carry is that it can be concealed. Especially when a belt carry option is not feasible. Such as in some public places or times when your not wearing a belt (i.e. waterborne activities/wearing swim trunks or PT/running). This will allow you to carry a fixed blade knife that is much durable than a folder.
There are many neck knives on the market built for this method of carry. Recently we did a video with Chance Sanders (spokesperson for Mission Knives) and showed us a few of their titanium models. I really liked their designs and with them using titanium as the knife steel; making it very unnoticeable for neck knife carry.
I've also attached a link to the Doug Ritter RSK featured above: