Some Leatherman products are crafted to follow TSA specifications for a carry-on item. Those products are listed below. One of our models - the Style PS - complies with all TSA requirements for a carry-on multifunction tool, but remember that it is ultimately up to TSA workers to decide what they are allowing on board or not. The current regulatory requirements can be found at www.tsa.gov. Other Leatherman products may be stowed in checked luggage that travels in the cargo area.ATTENTION: UPDATED TSA GUIDELINES ON KNIVESOn 5 June 2013, the TSA (US Transportation Safety Authority) announced that it had withdrawn its decision to allow Messer to be part of the hand luggage on board. More information about these changes can be found athttps://www.tsa.gov/travel/security-screening/prohibited-items.The following Leatherman products comply with current TSA regulations for carry-on items:TreadTread LTTread MetricBrewzerPiranha 2Style PSMako TiGrindJamThrusterPumpRailCamRimePlease note: Before carrying any Leatherman product on a flight or into any other restricted area, refer to the organisation’s published sharp object policy for your own protection. Security agents, such as TSA representatives, have full discretion over allowable items for the safety of all passengers, and international laws may vary. Please also note that Leatherman does not warranty tools that are lost, stolen, or confiscated.