In Minecraft, Flint & Steel can help you start a fire, ignite some TNT, or create a portal to the Nether.
To create Flint & Steel, you just need one piece of Flint which is mined from Gravel blocks, and one piece of Iron Ingot which is smelted from Iron Ore.
You can either use your inventory crafting or the Crafting Table to combine them. Combine them like the picture shown below, and you’ll receive one Flint & Steel per combination.