Been working on some prototypes for some combat knives of late.
These are an off shoot of that work.
My goal was to reduce a knife to the very smallest and simplest design while not loosing the function.
I have always liked ring knives but never saw a design that wouldn't pivot around and cut your fingers, so I added a spur to prevent that. An unexpected benefit was much better control and a surprisingly useful little design.
I call them Cat's Claws because they are easy to "velvet" until needed. Crafted from Aldo's 1/8" 15N20 and differentially hardened, these blades are shaving sharp.