A ring knife is any kind of knife you can wear as a ring. Some are designed as weapons and some as tools, but for the most part, they’re worn on the finger close to the knuckle, like a traditional ring. The Slice Safety Cutter Ring is meant to give the user maximum dexterity, so it fits near the tip of the index finger, more like a thimble than a wedding ring. This design gives the user more control over cuts.Some ring knives have exposed blades while others use a hook design to grab and cut string. In almost all cases, the blade is oriented so that it extends from the top, or outside, of the hand. Slice’s version places its micro-ceramic blade under the finger pad for comfort, safety, and control.