(This is a prototype. To help us improve, please leave your comments below. We appreciate your suggestions and feedback.)
A modified version has come out. http://www.thingiverse.com/thing:692893
FingerArmor reduces your risk of injuring your fingers while using knives. Put your index, middle and ring fingers into the finger pockets, and enjoy convenient cutting/slicing with low risks. This tool is designed for the left hand (right handed users only).
This design DOES NOT GUARANTEE a risk-free cutting. Please stay alert when using knives.