Flint and Steel

Flint and Steel is an item used to prime TNT (meaning the TNT will be set off and will explode). It can also be used to start Fires. Steel is a fancier way of saying iron ingot, so really you just need an Iron Ingot and some Flint. It can also be used to ignite creepers which was a PE exclusive feature but was added to PC.

Crafting recipe

 * 1 Iron Ingot + 1 Flint = Flint and Steel

Trivia

 * Flint and steel mines Stone faster than hand
 * Flint and steel was not in Creative mode as the inventory was not big enough to have it. It was added to the new creative menu in 0.8.0., which made it possible to detonate TNT in creative