This is a sparker to catch gas on fire, like for welding. It is old and rusted, but still works just fine. It holds 3 different flints, and one of them is completely worn. I guess you just buy a new sparker when all 3 wear down? I wish I knew more about welding, it's kind of awesome. But until I find an appropriate place to take up welding in my 2 bedroom condo, I'll stick to photography.