The Aurora Fire Starter is manufactured in the USA, is rugged, and is designed for survival. The Aurora Fire Starter uses a large 1/4 (.635cm) diameter composite flint steel rod that has magnesium built into it. You can wear the lightweight Aurora Fire Starter on your key ring or around your neck on a lanyard and if you are ever separated from your pack or knife you will still have everything you need to start a fire. The built-in Super Alloy Blade made from a tungsten, carbide, cobalt alloy takes off enough material to start a fire but will not cause excessive wear. This new Super Alloy Blade will not dull and is harder than any knife blade you will find. The built-in blade is part of the unit and will not get caught on equipment or rattle in combat or while hunting like other fire starters that have a blade hanging from a string. The Aurora Fire Starter is designed to function wet or dry, is machined from solid light weight aluminum (NO PLASTIC!), is knurled for grip, and will not break when you need it most. The Aurora Fire Starter has an overall length of 3.6 inch (9.14cm), a diameter of .625 inch (1.59cm), weighs 1/10lb. (45g), has an o-ring seal to prevent the housing from unscrewing and provide protection from corrosion in salt and fresh water environments.The Aurora Fire Starter is designed to last a life time and provide you with fire when the emergency situation occurs. To start a fire using the Aurora Fire Starter you: 1.Place your fire starting material on the ground (plain cotton balls, dryer lint, birch bark, milk weed fluff, burdock, or fine dry grass work great but any fine dry tinder usually found in the wild can be used). 2. Open your Aurora Fire Starter. 3. Scrape the composite flint steel/magnesium rod with the built-in Super Alloy Blade (or knife) at a 45 degree angle while aiming the hot burning sparks at your tinder and you have FIRE!