This is a huge ferrocerium rod. You get a solid grip on it, to easily start your fire. It is one inch diameter and 8 inches long. The ferro rod weighs one pound and 7 ounces. Strike this rod with a rough 90 degree edge piece of steel, your favorite striker or the back of your knife and watch the globs of molten metal roll off the ferro rod.
The sparks are 5,000 degrees F.
Aim the sparks at your favorite tinder and it will catch on fire, fatwood, cotton balls,dry grass,dryer lint or your favorite tinder, experiment with different tinder to see which tinder you like best. 
For best results use a quality ferroceriun rod striker like the ones I make and sell. Please see my other listings.