TSA Rules for EDC Gear: Every Item, Carry-On and Checked

The rule nobody quotes: what the law actually says

Here is the entire federal prohibition, in its operative words. 49 CFR 1540.111(a): an individual “may not have a weapon, explosive, or incendiary, on or about the individual’s person or accessible property” once screening has begun, in a sterile area, or while boarding.

That is it. The section does not contain the word knife, blade, scissors, tool, or lighter. It lists three exceptions, all of which are about people including law enforcement required to carry, individuals authorized under specific parts, and people authorized under a security program not about items. It has not been amended since May 26, 2006.

Then read the definitions section, 49 CFR 1540.5. It defines “screening function,” “screening location,” “sterile area” and a dozen other terms. It does not define “weapon,” “explosive” or “incendiary.” The entire prohibited-items regime rests on three undefined nouns.

This is why TSA writes, on its own list, that “our officers make the final decision on whether an item is allowed through the checkpoint,” and on a cigar-cutter note that “TSA officers have the discretion to prohibit any item through the screening checkpoint if they believe it poses a security threat.” Officer discretion is not an exception bolted onto the rule. Because the operative term is undefined, discretion is the rule at the checkpoint. Everything below is TSA’s published interpretation, which is what an officer will apply — but it is worth knowing it is an interpretation.

Every EDC item, carry-on and checked

Fifty-one items. “Controlling source” tells you whether the rule comes from a regulation you could cite or from a TSA web page you cannot. Sort any column.

Download the full dataset (CSV) — 50 items with the exact condition, the controlling citation, whether that citation is a regulation or a web page, and the specific gotcha for each.

Can you bring a knife on a plane?

No knife of any blade length is permitted in carry-on. TSA’s only exception is for “knives with rounded-blades, blunt edges without serration/teeth such as butter knives, or plastic cutlery.” Every knife goes in checked baggage, sheathed or securely wrapped.

The persistent myth of a small-blade allowance comes from a real event: in 2013 TSA proposed permitting blades up to 2.36 inches. The proposal was withdrawn. It never took effect, and pages that still hint at a length threshold are describing a rule that does not exist.

A multitool follows the blade, not the tool. TSA’s wording is unambiguous: “Multi-tools (multipurpose tools) with knives of any length are prohibited.” A one-inch nail file blade disqualifies the whole thing. Remove the blade, on tools where that is possible and the same multitool is carry-on legal, which is why bladeless multitools exist as a category at all.

Can you bring scissors on a plane?

Yes, if they measure less than 4 inches from the pivot point to the screw where the two blades cross, to the tip. Not overall length. Not handle to tip.

Two details competitors get wrong. First, TSA’s wording is “less than,” not “up to” or “does not exceed.” At exactly 4.00 inches you are outside the allowance. Second, because the measurement starts at the pivot and not the handle, a great many pairs of 6-inch household or barber shears have blades under 4 inches and are legal in carry-on. Measure before you assume.

There is also a contradiction on TSA’s own site worth knowing. The scissors entry says “less than 4 inches from the pivot point.” The multi-tools entry says “with scissors less than 4 inches” — and drops the datum. Read literally, multitool scissors are measured overall, which almost no multitool would pass, while standalone scissors are measured from the pivot. Two different tests for the same object on the same website. In practice, officers we have seen described applying the pivot measurement to both, but the published wording does not say so.

Can you bring a lighter on a plane?

You may carry one lighter, and it must be on your person or in your carry-on. The controlling text is 49 CFR 175.10(a)(2): “One packet of safety matches or a lighter intended for use by an individual when carried on one’s person or in carry-on baggage only.”

Two things follow from that sentence that essentially no travel guide notices.

It says “or.” Under the literal regulation you may carry a lighter or a book of matches, not both. FAA’s own 2013 passenger FAQ reads it that way too: “Airline passengers may bring only one lighter or one book of matches into the aircraft cabin.” FAA’s 2015 hazmat booklet lists them as two separate permitted items, and TSA lists both as “Yes” on separate entries. Nobody enforces the disjunction, but the regulation is written as one.

There is no checked-baggage exception anywhere in 175.10. The regulation permits a lighter on your person or in carry-on, full stop. Yet TSA’s page says fueled lighters are prohibited in checked bags “unless they adhere to the Department of Transportation exemption, which allows up to two fueled lighters if properly enclosed in a DOT approved case.”

We went looking for that exemption. FAA’s still-hosted 2013 FAQ names the manufacturers who held the permits — Colibri, Prometheus and Zippo. Here is what the PHMSA special-permit documents say:

Meanwhile FAA’s current printable chart, updated November 14, 2025, simply says lighters are “Not allowed in Checked Bags,” with no mention of any DOT container — and its lighters page, updated April 13, 2026, says the same. FAA appears to have quietly dropped the exception while continuing to host the two documents that describe it, and TSA still points travelers to it.

Practical advice: put your lighter in your pocket, not your checked bag. The permits named by manufacturer have lapsed, neither agency identifies an active permit number, and FAA’s current guidance says no. (We could not enumerate PHMSA’s full permit database, which is an interactive form, so we cannot categorically prove no successor permit exists — only that the ones the agencies name are expired.)

Torch, jet and blue-flame lighters are prohibited in both carry-on and checked baggage per FAA and TSA — even though the words “torch,” “jet” and “blue flame” appear nowhere in 49 CFR 175.10. That ban is agency web policy, not regulation. Lighter fluid and butane refills are absolutely prohibited both ways, by regulation. Arc and plasma lighters invert the rule entirely: allowed in the cabin, banned from checked baggage, because they are lithium-battery devices.

Can you bring a razor on a plane?

Cartridge and disposable razors: yes, carry-on and checked, no condition.

Safety razors are the trap. TSA’s own words: “A Safety Razor is allowed through the screening checkpoint without the blade. The blade must be removed prior to entering the screening checkpoint.” And then the line that costs people their razor: “TSA officers are not authorized to remove the blades from the holder.”

If you walk up with a loaded safety razor, the officer cannot unscrew it for you. Unscrew it yourself before you leave home, put the blades in checked baggage, and carry the empty handle. Loose blades and box cutters — “with or without blades” — are checked-only.

Can you bring a power bank on a plane?

Carry-on only, always. Never checked, at any capacity.

The reason is a single sentence of regulation almost nobody cites, 49 CFR 175.10(a)(18)(iv): “Articles containing lithium metal or lithium ion cells or batteries the primary purpose of which is to provide power to another device must be carried as spare batteries.” A power bank is legally a spare battery, and spare lithium batteries are carry-on only.

The capacity tiers, from FAA:

• 100 Wh or less — no quantity limit for personal use.
• 101 to 160 Wh — airline approval required, maximum two spares per person.
• Over 160 Wh — forbidden on passenger aircraft entirely, carry-on and checked. Anything marketed as a “power station” is in this class.

To convert: watt-hours equal volts times amp-hours; for mAh, divide by 1,000 then multiply by the voltage. A 20,000 mAh bank at 3.7 V is 74 Wh. A 27,000 mAh bank at 3.7 V is 99.9 Wh — legal, barely.

What about using it in flight? There is no US federal rule restricting in-flight use or charging of a power bank. We verified that three ways: 49 CFR 175.10 contains no such prohibition, and it expressly does ban onboard recharging for exactly two categories — lighters at (a)(2) and e-cigarettes at (a)(19) — which makes the silence at (a)(18) meaningful. FAA’s battery page, updated August 10, 2026, contains no use restriction. And a Federal Register search returns no rulemaking on the subject.

What does exist is FAA SAFO 25002, dated August 25, 2025, which recommends that operators instruct passengers to keep lithium batteries “visible and accessible.” Its own first page says it plainly: “This is a guidance document. Its content is not legally binding in its own right… Conformity with the guidance document is voluntary only.” The airline bans you have been reading about — keep it visible, no charging, not in the overhead — are carrier policy written in response to that advisory. You cannot be fined by TSA or FAA for using one. You can be denied boarding or removed by the airline.

Loose cells follow the same logic. Spare 18650s and CR123s go carry-on only, individually protected against short circuit — original packaging, taped terminals, or one battery per pouch. If you carry a high-output flashlight with spare cells, this is the rule you are most likely to break without knowing it.

Can you bring pepper spray on a plane?

Not in carry-on. In checked baggage, yes, under four conditions that all have to be met at once, from 49 CFR 175.10(a)(9) and the definition at 49 CFR 171.8:

1. One canister. Not two.
2. 118 mL (4 fluid ounces) maximum.
3. It must incorporate “a positive means to prevent accidental discharge” — a safety lock or flip-top.
4. Not more than 2 percent by mass of a tear gas substance (CN or CS).

TSA adds that some airlines will not carry it at all, so check the carrier. Bear spray is a different answer: prohibited in carry-on and checked, because a typical 225 to 290 mL canister fails the 118 mL cap outright. “It’s just pepper spray” is wrong on the only number that matters.

What it costs if you get it wrong

TSA publishes a penalty table, and this is one place where the agency’s own numbers do not agree with each other.

The discrepancy. TSA’s civil-enforcement page and its Enforcement Sanction Guidance Policy both state a ceiling of $14,950 per violation. TSA’s own regulation, 49 CFR 1503.401(c)(1), as amended effective December 29, 2025, sets it at $17,062 per violation, up to $100,000 for an individual. The sanction guidance document is dated November 14, 2022, and contains neither the figure $17,062 nor any reference to the FAA Reauthorization Act of 2024 that raised it. The air-carrier figure is stale too: $37,377 in the policy against $42,657 in the regulation.

One more thing we checked because it seemed unlikely: DHS publishes an annual inflation adjustment to these penalties, normally in January. A Federal Register query for 2026 returns zero results. As of August 19, 2026 the operative figures are still the ones set on December 29, 2025.

For context on scale: TSA intercepted 6,678 firearms at checkpoints in calendar year 2024, about 94 percent of them loaded, across 904 million passengers — 7.4 per million, down from 7.8 in 2023. The record was 2023, at 6,737. A firearm at a checkpoint also costs you TSA PreCheck for at least five years. We could not locate a 2025 annual figure, so we are not publishing one.

Flying home: the rule that is not a TSA rule

TSA’s list governs departures from US airports. It has no force abroad. At a foreign departure airport, screening runs under the local authority’s rules and the carrier’s own security program — 49 CFR part 1546 governs foreign air carriers only “within the United States,” and it uses a different undefined standard, “a deadly or dangerous weapon,” rather than 1540.111’s “weapon.” A knife that is legal in your checked bag on the outbound leg can be seized outright on the return.

Bringing a knife back into the country is also an importation, and that is a separate body of law. The Federal Switchblade Act, 15 U.S.C. §§ 1241–1245, defines a switchblade as a knife that opens automatically by a button in the handle “or by operation of inertia, gravity, or both.” In 2009 Congress added an exception at 15 U.S.C. § 1244(5) for assisted-opening knives — a knife with “a spring, detent, or other mechanism designed to create a bias toward closure” that requires hand pressure on the blade to open.

Here is the live conflict. CBP’s implementing regulation, 19 CFR 12.98, lists only three exceptions — Armed Forces contracts, Armed Forces members, and a one-armed person with a blade of three inches or less. Its source note ends at 1990. Congress added the assisted-opening exception in October 2009, and CBP has never amended the regulation to reflect it. A statutory exception that has been law for nearly seventeen years is absent from the regulation a port officer applies.

It gets sharper. 19 CFR 12.95(a) sweeps in “Balisong,” “butterfly,” “gravity” and “ballistic” knives, unassembled knife kits, and even bladeless handles — a definition broader than the statute it implements. And 12.95(a)(2) covers knives that “by insignificant preliminary preparation” could be converted to open automatically, with 12.95(b) defining that as work anyone with “no special manual training or skill” could do. Switchblade imports are “importations contrary to law” and subject to forfeiture.

Fixed blades are different and this is the useful part: 19 CFR 12.96(b) states that sheath knives, machetes, swords and similar articles are not within the prohibition — while warning that “upon release by Customs, possession of these admissible articles… may be in violation of State or municipal laws.”

If you are traveling with a firearm rather than a blade, the rules are different again and the stakes are higher; start with our guide to flying with a gun and Freedom’s Lodge on flying with firearms.

Two things you have probably read that are out of date

REAL ID is not fully enforced yet. 6 CFR 37.5(d) permits federal agencies to implement through “a phased enforcement plan,” and requires them to “achieve full enforcement… no later than May 5, 2027.” That language was added by 90 FR 3503 on January 14, 2025. TSA’s own FAQ hedges accordingly, saying travelers must have a REAL ID or other acceptable ID “once TSA is enforcing the REAL ID requirement at airports.” The widely repeated “required as of May 7, 2025” framing is not what the regulation says.

3-1-1 has not changed. TSA’s liquids page, as of August 19, 2026, still reads: containers of “3.4 ounces or 100 milliliters,” one quart-size bag per passenger. There is no mention of CT scanners, no relaxation, no expanded allowance. Whatever you have read about scanner-driven changes is not reflected in the published rule.

What did change: DHS announced the end of the shoes-off requirement on July 8, 2025. We confirmed the announcement’s date and existence but could not retrieve the release text directly; TSA’s current FAQ contains no instruction to remove shoes in standard screening, which is consistent.

The honest gaps

TSA does not publish an entry for several things people carry every day, and we would rather say so than invent an answer:

• Straight razors, throwing stars, credit-card knives, ceramic knives, small titanium pry bars, handcuff keys and pointed self-defense keychains — no dedicated entries. They fall to the Knives rule, the 7-inch tool rule, or pure officer discretion.
• Flashlights have no published size, length or lumen limit. They are simply listed as allowed both ways. The unwritten limit is the bludgeon judgment.
• Tactical pens and wrenches/pliers — our extraction passes disagreed and TSA’s individual item pages were unreachable all day, so we are flagging both as unverified rather than guessing.
• TSA publishes no ranked dataset of most-confiscated items. The penalty categories are a sanctions taxonomy, not counts.

Sources

• 49 CFR 1540.111 — Carriage of weapons, explosives, and incendiaries by individuals
• 49 CFR 175.10 — Exceptions for passengers, crewmembers, and air operators
• 49 CFR 1503.401 (civil penalties) and 49 CFR 171.8 (self-defense spray definition), eCFR
• 90 FR 60571, Civil Monetary Penalty Adjustments for Inflation, December 29, 2025
• TSA, What Can I Bring? complete list and TSA Civil Enforcement
• TSA Enforcement Sanction Guidance Policy (dated November 14, 2022)
• FAA PackSafe, Airline Passengers and Batteries (updated August 10, 2026) and the FAA PackSafe printable chart (updated November 14, 2025)
• FAA SAFO 25002, August 25, 2025
• PHMSA special permits DOT-SP 14327 and DOT-SP 14415
• 15 U.S.C. §§ 1241–1245 (Federal Switchblade Act); 19 CFR 12.95–12.103; 6 CFR 37.5; 90 FR 3472 (January 14, 2025)
• TSA press release, “TSA intercepts 6,678 firearms at airport security checkpoints in 2024,” January 15, 2025

Related on Popular EDC: What is EDC? · Build your EDC loadout · Best EDC backpacks · EDC flashlight lumens explained · How to fly with a gun

Across the Brand Avalanche network: Freedom’s Lodge on flying with firearms · Popular Outdoorsman’s carry reciprocity guide for travelers

Last verified: August 19, 2026. TSA and FAA revise these pages without notice; this guide is re-checked quarterly and whenever a regulation is amended. Verify at tsa.gov before you travel.