Ferro rod: sparks in any weather, if your tinder is ready
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Quick answer
A ferro rod is a ferrocerium rod. When you scrape it hard with a striker or the sharp spine of a knife, it throws hot sparks onto tinder. Makers say it works wet or dry: Exotac says its sparks burn at roughly 5,500°F, and Light My Fire lists 5,400°F. A rod lasts thousands of strikes, from up to 3,000 on Exotac's small nanoSTRIKER XL to up to 20,000 on its half-inch fireROD XL. The spark is the easy part. Dry, fine tinder is what turns it into fire.
Three ferro rod fire starters compared
| Spec | Exotac nanoSTRIKER XL | Light My Fire FireSteel Army 2in1 | Exotac fireROD XL |
|---|---|---|---|
| Rod | 1/4 in, replaceable | Built-in | 1/2 in, replaceable |
| Strikes listed | Up to 3,000 | Up to 12,000 | Up to 20,000 |
| Striker | Stainless with tungsten-carbide insert | Not listed in the specs we read | Use your knife's sharp spine |
| Extras | Collapses for a keyring; burnable lanyard core | Built-in 120 dB whistle | Sealed tinder storage; about 12 in of burnable repair tape |
| Size | Keyring size | Not listed | 6 in, 3.8 oz |
Exotac's half-inch rod lists more than six times the strikes of its quarter-inch rod and, Exotac says, a larger shower of sparks, at the cost of size and weight.
How to strike a ferro rod
- Build the tinder first. Exotac recommends fine, dry, high-surface-area tinder such as dry grass, wood shavings, cotton or dryer lint, gathered into a loose bundle.
- Angle the striker. Exotac says to hold the striker at an angle and scrape with quick, firm pressure so it carves material off the rod, placing the sparks on your tinder.
- Catch the flame. Once the tinder lights, Smokey Bear's advice is to blow lightly at the base of the fire, then add kindling and fuel.
With the fireROD XL, Exotac says to strike with the sharp spine of your knife; many bushcraft knives leave the spine edge sharp for this.
Tinder that takes a spark
- Natural tinder: Smokey Bear lists small twigs, dry leaves, grass and needles.
- Carried tinder: Exotac lists cotton, dryer lint and purpose-made tabs. Its fireROD XL stores tinder inside a sealed body.
- Built-in backups: the inner strand of Exotac's 550 FIRECORD lanyard and the fireROD XL's repair tape can both be burned to help a spark become a flame.
- Stoves: Exotac says the nanoSTRIKER XL also lights gas and alcohol stoves, fuel tablets and grills.
Ferro rod vs matches and lighters
- Weather: Light My Fire says its FireSteel works when wet and windy; Exotac says its rods work wet or dry.
- Life: thousands of strikes per rod, and Exotac's rods are replaceable.
- Skill: unlike a lighter, a ferro rod gives sparks, not a flame, so it depends on prepared tinder and some practice.
Many kits carry both: Ready.gov's kit list includes matches in a waterproof container, and a ferro rod is a long-lasting backup. Practice at home before you rely on one.
Campfire safety
- Check the rules: Smokey Bear says to search for fire restrictions where you are and never build a fire where rules prohibit it or in dry or windy conditions.
- Clear space: stay at least 15 feet from tents, vegetation and low branches, and clear a 10-foot circle around the pit.
- Have water ready: keep water, a bucket and a shovel on hand.
- No accelerants: never use flammable liquids to start a fire.
- Put it out fully: drown the fire, stir it with a shovel, and keep adding water until everything is cool. Smokey Bear says not to rely on dirt or sand alone.
What to look for when you buy
Smallest: Exotac nanoSTRIKER XL
Best for: A keyring or pocket backup that also lights stoves
Exotac lists a 1/4 in replaceable ferrocerium rod good for up to 3,000 strikes, a stainless striker with tungsten-carbide insert, a waterproof body and a lanyard whose inner strand burns as tinder.
Watch out: The small rod gives the fewest strikes here; carry the refill if you use it often.
See options on Amazon (opens Amazon in a new tab)With a whistle: Light My Fire Swedish FireSteel Army 2in1
Best for: A grab-bag fire starter that doubles as a signal whistle
Light My Fire lists up to 12,000 strikes, sparks of 2,980°C / 5,400°F, use in wet and windy weather, a built-in 120 dB emergency whistle and manufacture in Sweden.
Watch out: The rod is not listed as replaceable; the smaller Scout version lists 3,000 strikes.
See options on Amazon (opens Amazon in a new tab)Longest-lasting: Exotac fireROD XL
Best for: Frequent use and knife-sheath carry
Exotac lists a replaceable 1/2 in rod good for up to 20,000 strikes, sealed tinder storage, about 12 in of burnable repair tape and a 6 in, 3.8 oz machined aluminum body.
Watch out: No striker included; Exotac designs it to be struck with a knife spine.
See options on Amazon (opens Amazon in a new tab)Questions people ask
- What is a ferro rod?
- A rod of ferrocerium that throws hot sparks when scraped with a hard striker or a knife's sharp spine, used to light tinder.
- Do ferro rods work when wet?
- Makers say yes: Exotac says its rods work wet or dry, and Light My Fire says its FireSteel works when wet and windy. The tinder still needs to be dry.
- How many strikes does a ferro rod last?
- The makers here list up to 3,000 for a 1/4 in rod, 12,000 for Light My Fire's Army and 20,000 for a 1/2 in rod.
- What is the best tinder for a ferro rod?
- Fine, dry, high-surface-area material such as dry grass, wood shavings, cotton or dryer lint, as Exotac recommends.
Sources
- nanoSTRIKER XL, Exotac
- fireROD XL, Exotac
- Swedish FireSteel army 2in1, Light My Fire
- Swedish FireSteel scout 2in1, Light My Fire
- Campfire safety, Smokey Bear
- Build a Kit, Ready.gov