Hammer
Hammers of any size are not allowed in carry-on and must be packed in checked baggage.
Carry-on
Not allowed
Checked
Allowed
Carry-on details
Not allowed. Unlike smaller hand tools, hammers are specifically prohibited in carry-on bags regardless of size — TSA treats them as a blunt-force weapon risk rather than applying the 7-inch tool-length rule.
Checked-bag details
Allowed. Hammers can be packed in checked baggage without restriction.
Special instructions
This includes mallets and rubber-headed hammers, which TSA groups with hammers rather than under the 7-inch length exception that applies to screwdrivers, wrenches, and pliers.
FAQ
- Is there a size exception for a small hammer in carry-on?
- No. Unlike screwdrivers or pliers, hammers don't have a length exception — any size hammer must go in checked baggage.
Related items
Source: TSA — What Can I Bring? · Last verified: 2026-07-30
Final decision rests with the security officer at the checkpoint.