Yeeeaaa! You Got neck knife thread!
Good call Hokie_Fan.
+1 Alan Folts Custom Minimalist. I own both the 'Real' ones and one made by CRKT collaboration - the latter simply doesn't hold up in edge durability/retention compared to Alan Folts's cpm-154. Alan's blades are far superior in all the right categories, and after using my CRKT version off and on over a year I've felt for a long time it's basically a beefy razor blade whereas Alan's customs are KNIVES. The edge on the CRKT is too thin/too severe an angle for the steel used IMHO...perhaps one could fix this by establishing a new edge but I'd still feel like I was using two razor blades smashed together. You'll also notice in the pics that Alan Folts makes them the proper size, and for some reason(saving steel?) CRKT went ahead and made the handles too tiny. Scales now slide on the CRKT version even after retightening. There's a reason they cost $20, folks. Just so happens Folts's neck knife probably has the best use/feel of a lanyard ever seen on a knife of this size. Your pinky wraps around the lanyard turning the three finger handle into a four finger secure grip. Some of the three finger neck knives I have coming in the mail from various makers have mimicked his handle design and lanyard use.
wow this looked so much better on my phone...sorry for the awful pic.

Todd Wielinksi's True Saber is a very nice neck knife as well(along with the other customs) and even a hair thinner overall compared to the Minimalist, making it super streamline in the kydex sheath. This would be my other recommendation if you wanted a little bit more 'Knife'. Mine is W2, but there are a bunch that showed up over at dlttrading.com in the past month in 20CV. Feels very nice in hand, and great design concept for nesting the thumb on the spine. For reference, I prefer a 4.25" handle and the True Saber offers more than enough purchase. I often forget it's hanging from my neck.
The kirinite handled knife pictured was just scored from g-knives(thank you sir!) here at the forums and it wasn't setup as a neck knife, but it's super lightweight with its tapered tang and streamline custom leather sheath so I'm gonna change that with a quick paracord bend & wrap!
If you want an Alan Folts Minimalist, you have one option if you don't want to wait: Head over to gpknives.com where they have a variety on stock right now. They sometimes show up over at Fort Henry, but usually one at a time and they sell immediately.
There are a lot of steel handled neck knives out there, but I don't own any because I like using mine in the cold with no gloves. Certainly not a concern in the current weather.
Neck knives rock!
