#22 Scalpel Blade Stainless steel, in sealed foil packaging, more functional than a single-edged razor blade First off, this is not a substitute for a real knife. The POCKET SURVIVAL PAK™ retail package insert recommends a good knife always be carried in addition to this PSP. However, an ultra-sharp blade such as this can be very useful and it serves as a back-up for your primary blade. This stainless steel blade is packaged in sealed foil, preventing rust and corrosion. It won’t rust like the cheap single edge razor blades included in many pocket survival kits. Compared to the single edge razor blade often packed in lesser kits, this blade is more robust and has a real point and belly to the blade for more versatile functionality. The blade can be attached to a piece of branch using the wire in the POCKET SURVIVAL PAK™ to improvise a knife with a handle.