STEEL WIRE 20" FINGER-TIP WIRE SAW
This Stansport product is called the Finger-Tip Saw (although all you really need to cut off fingertips is a good garden pruner). This is actually a survival/hunter's wire saw, a 20" long, thin and sharp serrated wire with a 1-1/8" slip-ring at each end (for your fingertips). Coil it up and you can store it in a shirt pocket. Cuts "wood, plastic, bone, etc." and includes instructions for making a one-handed saw with a short tree branch.