ParaKnife 4.0 PRO Features ParaKnife 4.0: A durable 4 inch (101mm) long, 4mm thick stainless steel blade is a handy knife to have on the trail. The saw tooth blade adds maximum cutting functionality, and the black-oxide finish reduces rust and protects the blade. Protective sheath for safe storage included. ParaTinder Utility Cord: The ParaTinder handle wrap provides a secure grip in all weather conditions and unwraps to provide around 6 feet (1.8m) of paracord with an added single tinder thread. To ignite ParaTinder, expose red core thread and light with included fire starter. Inner paracord strands can be used as sewing thread, sutures, fishing line, and more. Fire Starter: The flint fire starter produces sparks in even the worst conditions. Lightweight and compact, it is easily stored in the included protective sheath. Will ignite a wide range of tinders. Whistle: The wrist lanyard features an integrated whistle for an easy-to-use signal device.