The Tinder HOT Box Solar Fire Starter is used to store fire starting tinder in the air/water tight tinder box portion of the unit that is sealed from the elements using an o-ring seal. This keeps the damp air/water out so your tinder always stays dry! A great companion to our other fire starters! It is also a solar powered fire starter. There are no moving parts, no flint, no fuels, no gases, and no batteries! In addition, you will always have dry tinder in the air/water tight tinder box to use to start your fire! The inside bottom of the tinder box is a parabolic reflector that focuses all solar energy to a singular point just below the base of the removable and stowable tinder holder arm. The tinder holder arm is securely stowed in the top housing during non-use and has a circular area and an expandable slot at the top to insert and lock your tinder in place just above the focus of the Tinder HOT Box Solar Fires Starter portion of the unit. The tinder holder arm also has light- through holes for maximum efficiency and the Tinder Holder can be changed from stow configuration to fire starting configuration in seconds by simply removing from the top inside cover and pressing into place! The Tinder HOT Box Solar Fire Starter is only 2.625 inches in diameter, .725 inches thick, weighs only 4 oz and can easily fit in your pocket! Machined from solid aircraft aluminum, the outside of the Tinder HOT Box Solar Fire Starter is knurled for grip to make it easier for you to access your dry tinder during those cold damp outings! Works great with wild tinder such as dry leaves and easily ignites char cloth. A small piece of a charcoal briquette ignited and then transferred to a bundle of toilet or tissue paper also works great! Comes with complete instructions.